Long and Short Chapter 2 Class 4 Math JKBOSE Solutions

“Long and Short” is Chapter 2 from Merry Math IV for students of Class 4th of JKBOSE. This particular post is about Long and Short Chapter 2 Class 4 Math JKBOSE Solutions. In a previous post, you read about Building and Bricks Class 4 Math JKBOSE Solutions. Let’s get started:

Long and Short Chapter 2 Class 4 Math JKBOSE Solutions

Page No. 13 Solutions

How Far Apart Are the Dots?

Guess the distance between any two dots. How many centimetres is it? Now measure it with the help of a scale. Did you guess right? Ans. The guessed distances between any two dots are:

J and N = 1.5 cm
O and D = 1.5 cm
N and H = 1.0 cm
B and D = 2.0 cm
N and F = 2.5 cm
B and I = 2.0 cm
L and H = 4.8 cm
A and B = 2.5 cm
G and H = 5.5 cm
A and I = 2.5 cm
D and M = 7.0 cm
A and J = 1.5 cm
A and D = 3.0 cm
O and M = 8.0 cm
I and H = 5.0 cm
A and L = 3.0 cm
J and M = 3.0 cm
A and G = 4.0 cm
A and H = 3.0 cm
A and C = 2.5 cm
After measuring it with the help of a scale, we find the distance between the dots is as under:

O and D = 0.9 cm
B and D = 1.2 cm
N and F = 1.4 cm
L and H = 4.9 cm
B and I = 1.3 cm
A and B = 2.3 cm
A and I = 1.5 cm
A and J = 1.2 cm
G and H = 5.6 cm
D and M = 7.1 cm
O and M = 7.9 cm
I and H = 4.5 cm
A and D = 3.3 cm
J and M = 2.7 cm
A and L = 2.6 cm
A and G = 3.5 cm
A and H = 3.0 cm
A and C = 2.3 cm
J and N = 1.1 cm
N and H = 1.2 cm

Which two dots do you think are farthest from each other? Check your answer.

Ans. Dots ‘O’ and ‘M’ are farthest from each other.

Which two dots are nearest to each other? Check your answer. 

Ans. Dots ‘O’ and ‘D’ are nearest to each other.

Page No. 14 Solutions

The Shorter Line

Akbar was a famous king. He had a smart minister called Birbal. Once Akbar gave him a difficult question. He drew a line on the floor.

Look at the picture and explain how Birbal made Akbar’s line shorter. 

Ans. Birbal made Akbar’s line shorter by drawing a longer line than that of Akbar’s line.

Now can you be as smart as Birbal? Make his line shorter without

erasing it. Just think – is there any longest line?

Ans. Yes, I can be as smart as Birbal. I can make Birbal’s line shorter without erasing it by drawing a line longer than his line.

No, there is no longest line.

Page No. 15 Solutions

Let’s Try This

Make her right arm 1 cm longer than the left arm.

Ans. Her right arm is 1 cm longer than her left arm.

Draw a cup 1 cm shorter than this cup.

Ans. Here is the 1 cm shorter than the given cup.

Draw a broom half as long as this broom.

Ans. Here is the broom half of the length as the given broom.

Draw another hair of double the length.

Ans. Another hair of double the length is shown below:

How Tall Have You Grown?

Do you think you have grown taller? 

Ans. Yes, I have grown taller. 

How much?

Ans. Near about 4 cm.

Have your friends also grown taller?

Ans. Yes, my friends have also grown taller.

Find out and fill the table 

Ans.

Page No. 16 Solutions

Roshni once read a list of the tallest people in the world. One of them was 272 cm tall! That is just double of Roshni’s height.

How tall is Roshni?

Ans. Height of the tallest man = 272 cm.

Roshni’s height is half of the height of the tallest man.

Therefore, Roshni’s height is 272 cm ÷ 2 = 136 cm.

Imagine

Could that person pass through the door of your classroom without bending?

Ans. No, that person could not pass through the door without bending.

Will his head touch the roof of your house if he stands straight? 

Ans. Yes, his head will touch the roof of our house if he stands straight.

The Long and Short of Your Family!

Who is the tallest in your family? ______

Ans. My father is the tallest in our family.

Who is the shortest in your family? ______

Ans. My sister is the shortest in our family.

What is the difference between their heights? ______

Ans. The difference between their heights is 36 cm

Page No. 17 Solutions

Inter-School Sports Meet

Race

This is a 100-metre race for girls. Amina is nearest the finishing line. She is about six metres from it.

Behind her is Rehana. Alka and Dolma are running behind Rehana. Look at the picture below

Choose from these distances:

3 metres

6 metres

10 metres

15 metres

(a) How far is Rehana from Amina? 

Ans. Rehana is 3 metres from Amina.

(b) How far ahead is Rehana from Alka and Dolma?

Ans. Rehana is 6 metres ahead of Alka and Dolma.

(c) How far are Alka and Dolma from the finishing line?

Ans. Alka and Dolma are 15 metres away from the finishing line.

Have you heard about a 1500 m or 3000 m race?

(You remember that 1000 metres make 1 kilometre and 500 metres make half a kilometre.)

So, you can say:

In a 1500-metre race, people run one and a half km.

In a 3000-metre race, people run 3 km.

Page No. 18 Solutions

Have you heard about marathon races in which people have to run about 40 kilometres? People run marathons on roads because the track of a stadium is only 400 metres.

10 rounds of a stadium track = _____ km.

Ans. 10 rounds of a stadium track = 400 metres x 10 = 4000 metres.

1000 metre = 1 km

So, 4000m = 4 km Ans.

So, if you run a marathon on a stadium track, you will have to complete ______ rounds!

Ans. Total length of the marathon race = 40 km = 40×1000 m = 40000 m

Distance covered in 1 round of stadium track = 400 m

Number of rounds in 40000 m = 40000/400 = 100

You will have to complete 100 rounds,

Long Jump

Aslam has the longest jump of 3 metres 40 cm. Manpreet is second. His jump is 20 cm less than Aslam’s. Gopal comes third. His jump is only 5 cm less than Manpreet’s jump.

How long are Manpreet’s and Gopal’s jumps?

Ans. So, Manpreet’s long jump = Aslam long jump – 20 cm

= 3 metres 40 cm – 20 cm

= 3 metres 20 cm. Ans.

Gopal’s long jump = Manpreet’s long jump – 5 cm

= 3 metres 20 cm – 5 cm

= 3 metres 15 cm Ans.

Try and see how far you can jump.

Ans. I can jump a distance of 2 metres.

How far can you throw a ball? ______ metres

Ans. 6 metres approx.

Look for a big ball, like a football or volleyball. How far can you kick it?

Ans. 10 metres to 15 metres approx.

Page No. 19 Solutions

Here are the Indian and World Records for some jumps.

Find out from the Table

1. How many centimetres more should Chandra Pal jump to equal the Men’s World Record for the high jump?

Sol. World Record for high jump = 2 m 45 cm

Chandra Pal’s high jump = 2 m 17 cm

Chandra Pal should jump more = 2 m 45 cm – 2 m 17 cm = 28 cm.

2. How many centimetres higher should Bobby A. jump to reach 2 metres?

Remember that 1 m = 100 cm. Half metre = 50 cm. 

Sol.

We know 1m = 100 cm

Bobby A’s High jump record = 1 m 91 cm = 191 cm

Now, 2 metres = 2 × 100 = 200 cm

To reach 2 metres height, she requires 200 cm – 191 cm = 9 cm higher jump

3. Galena’s long jump is nearly 

(a) 7 metres 

(b) 7 and a half metres 

(c) 8 metres.

Ans. Galena’s long jump is 7 and a half metres.

4. Look at the Women’s World Records. What is the difference between the longest jump and the highest jump?

Sol. The difference between the longest jump and the highest jump is:

= 7 m 52 cm – 2 m 9 cm = 5 m 43 cm Ans.

5. If Mike P. could jump ______ centimetres longer, his jump would be a full 9 metres.

Sol. If Mike P. could jump 5 centimetres longer, his jump would be full 9 metres.

(9 m – 8 m 95 cm) = 5 cm.

6. Whose high jump is close to two and a half metres?

(a) Stefka K. 

(b) Chandra Pal 

(c) Javier S. 

(d) Bobby A.

Ans. Javier S’s. high jump is very close to 2 and a half metres.

Page No. 20-21 Solutions

Now Let’s Try These:

1. Write the length of each of the following segments by reading the scale.

Sol. (a) 11 cm (b) 9 cm (c) 2 cm.

2. Using a 15-cm scale, find the lengths of the following objects (in centimetres).

[Remember, we measure from zero mark.]

(a) How long is the nail?

Ans. It is 3 cm long.

(b) How long is the pencil?

Ans. It is 4 cm long.

(c) How long is the leaf?

Ans. It is 3 cm long.

(d) How long is the brush?

Ans. It is 8 cm long.

(e) How long is the 10 rupee note?

Ans. It is 12 cm long.

3. Find the length of the following objects (in centimetres):

(a) A postcard

(b) A book

(c) A chalk – stick 

(d) An eraser.

Ans. Students have to measure the length of the mentioned objects using scale.

4. Draw line segments of the following lengths:

(a) 3 cm

(b) 6 cm

(c) 8 cm

(d) 5 cm

(e) 10 cm

(f) 7 cm

(g) 9 cm

(h) 2 cm

(i) 5.5 cm

(j) 7.5 cm

(k) 10.5 cm

 (l) 6.5 cm.

Ans. Students have to draw the line segments of the mentioned lengths themselves.

Page No. 22 Solutions

Running Exercise

The doctor has told Mohammad Sadiq to run 2 km every day to stay fit. He took one round of this field. How far did he run?

Ans. All sides of this field are equal

Length of one side = 500 m

Length of four sides

= 4 × 500 m

= 2000 m

= 2 km

So, he had run = 2 km.

The field was very far from his home. So, he chose a park nearby. The boundary of the park was about 400 metres long.

How many rounds of the park must Mohammad Sadiq run to complete 2 km?

Sol. Length of the boundary of the park = 400 m

Number of rounds required to complete 2 km

So (1 km = 1000 m; 2 km = 2000 m) 2000 ÷ 400 = 5 Ans.

One day the weather was very good and a cool breeze was blowing. He felt so good that he kept jogging till he got tired after 8 rounds. That day he ran ________km and ______meters!

Sol. Distance covered in 8 rounds

= 8 × 400 m = 3200 m

= 3000 m + 200 m

= 3 × 1000 m + 200 m

= 3 km 200 m

Therefore, that day he ran 3 km and 200 m.

How Many Rooms High?

The Qutab Minar is 72 metres high.

About how many metres high is your classroom?

Ans. The classroom is about 3 metres high.

Guess how many rooms, one on top of the other, will be equal to the Qutab Minar.

Explain how you made a guess. 

Ans. Number of rooms one on top of the other, which will be equal to the Qutab Minar Height of Qutab Minar ÷ Height of one room

72 ÷ 3

= 24 Ans.

Page No. 23 Solutions

From Bhisna to Channi

Anikait is going to Bhisna which is 24 kilometres (km) away. Anjali is going to Channi which is 46 km away in the opposite direction.

How far is Bhisna from Channi? 

Ans. Total distance of Bhisna from Chaani = 24 km + 46 km = 70 km Ans.

How Far is Your Home from School?

Akram comes to school from very far away. He first walks about 400 metres to the pond. With slippers in his hands, he then walks 150 metres through the pond. Next, he runs across the 350-metre wide green field. Then he carefully crosses the 40-metre-wide road to reach his school.

Page No. 24 Solutions

How much does Akram walk every day to reach school?

Ans. Total distance covered by Akram every day to reach school = 400 m + 150 m + 350 m + 40 m = 940 metres.

Is it more than 1 km?

Ans. It is not more than 1 km.

Find out how far your friends live from school and fill the table. Write in metres or kilometres.

Ans.

Who among you lives nearest to the school? ___________

Ans. Rafiq lives nearest to the school.

Who lives farthest from the school? ___________

Ans. Sunil lives farthest from the school.

How many children live less than 1 kilometre away from your school? ____________

Ans. Only Rafiq lives in less than 1 kilometre away from school.

Is there anyone who lives more than 5 km away from the school?

Ans. Yes, Rehman and Sunil live more than 5km away from the school.

How do they come to school? _______________

Ans. They come to school by bus.

Page No. 25 Solutions

Guess and Find Out

1. How long is the thread in a reel? 

Ans. 50 metres to 500 metres approx. 

2. How long is the string of a kite reel? Can it be more than a kilometre long?

Ans. 500 metres to 1000 metres approx. Yes, it can be more than a kilometre long.

3. If a handkerchief is made out of a single thread, how long would that thread be?

Ans. That thread would be 1000 metres approx.

Page No. 26 Solutions

I Wish I Were!

Try to find out :

1. Which is the highest building that you have seen? About how many rooms high was it?

Ans. I have seen Qutab Minar. It is about 24 rooms high.

2. How high can a kite go? Can it go higher than the Qutab Minar? 

Ans. A kite can go to a height of about 160 metres.

Yes, It can go higher than the Qutab Minar.

3. How high can a plane fly? Can it fly higher than Mount Everest which is about 9 km high?

Ans. A plane can fly to the height of 3000 metres to 7000 metres. It cannot fly higher than Mount Everest.

4. Have you ever seen clouds below you?

Ans. Yes.

That’s it about Long and Short Chapter 2 Class 4 Math JKBOSE Solutions. Hope you found it useful. Do share your views about this post in the comment section below.