**Long and Short**

*Questions with (*) sign are open ended questions.*

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?

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

The dots M and O are farthest to each other.

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

The dots D and O are nearest to each other.

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

Birbal drew a line longer than the Akbar’s line.

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

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

Draw a cup 1 cm shorter than this cup.

Draw a broom half of double the length.

Draw another hair of double the length.

Do you remember that in class 3 you measured your height?

Yes.

Do you think you have grown taller?

Yes, I have grown taller.

How much?

__About 5__ cm.

Have your friends also grown taller?

Yes.

Find out and fill the table below.

Friend’s name | Height (last year) | Height (this year) | How much grown? |

Ayush | 1 m 20 cm | 1 m 28 cm | 8 cm |

Vinay | 1 m 45 cm | 1 m 50 cm | 5 cm |

Ajay | 1 m 22 cm | 1 m 26 cm | 4 cm |

Nilesh | 1 m 15 cm | 1 m 22 cm | 7 cm |

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

Height of the tallest person = 272 cm

It is double Jhumpa’s height.

Therefore, Jhumpa’s height = half of 272

= 136 cm.

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

No, he cannot pass through the classroom door without bending.

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

Yes, his head touches the roof.

*(*) *Who is the tallest in your family?

My father is the tallest in my family. His height is 168 cm.

*(*) *Who is the shortest in your family?

My younger sister is the shortest in my family. Her height is 102 cm.

What is the difference between their heights?

168 – 102 = 66

The difference between their heights = 66 cm

Page 16

This is a 100 metre race for girls. Arundhati is nearest the finishing line. She is about 6 metres from it. Behind her is Rehana. Konkana and Uma are running behind Rehana. Look at the picture.

To answer the questions below choose from these distances.

-3 metres

-6 metres

-10 metres

-15 metres

a). How far is Rehana from Arundhati?

-3 metres

b). How far ahead is Rehana from Konkana and Uma?

6 metres.

c). How far are Konkana and Uma from the finishing line?

15 metres.

Have you heard about a 1500m or 3000m race? (you remember that 1000 metres make 1 kilometre and 500 metres make half a kilometer).

So you can say-

In a 1500 metres race people run __1 and half__ km.

In a 3000 metres race people run __3__ km.

Page 17

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

So, if you run a marathon on a stadium track, you will have to complete ___________ rounds.

Length of the stadium track = 400 m

10 rounds of stadium track = 400 X 10

= 4000 m *(1 km = 1000 m)*

= 4000 ÷ 1000

= 4 km

10 rounds of a stadium track = __4__ km

Length of marathon race = 40 km

= 40 X 1000 *(1 km = 1000 m)*

* * = 40000 m

Length of the stadium track = 400 m

Number of rounds in stadium track = 40000 ÷ 400

= 100

So, if you run a marathon on a stadium track, you will have to complete __100 __rounds.

Dhanu has the longest jump of 3 metres 40cm. Gurjeet is second. His jump is 20 cm less than Dhanu’s. Gopi comes third. His jump is only 5 cm less than Gurjeet’s jump.

How long are Gurjeet’s and Gopi’s jump?

Gurjeet’s jump:

Gurjeet’s jump is = 20 cm less than Dhanu’s jump.

= 3m 40cm – 20 cm

= 3m 20cm

Gopi’s jump:

Gopi’s jump = 5 cm less than Gurjeet’s jump

= 3m 20cm – 5 cm

= 3m 15cm

*(*) *Try and see how far you can jump.

I can jump 1m

*(*) *How far can you throw a ball?

__7 to 8__ metres.

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

About __20 __metres

Page 18

Sports | World Record | Indian Record |

High jump (Men) | Javier S. (2m 45cm) | Chandra Pal (2m 17cm) |

Long jump (Men) | Mike P (8m 95cm) | Amrit Pal (8m 8cm) |

High jump (Women) | Stefka K (2m 9cm) | Bobby A (1m 91cm) |

Long jump (Women)) | Galina C (7m 52cm) | Anju G (6m 83cm) |

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?

Men’s World Record for high jump = 2m 45cm

Chandra Pal’s Record for high jump = 2m 17 cm

2m 45cm – 2m 17cm = 28 cm

More centimetres required by Chandra Pal to equal the Men’s World Record for high jump is 28cm.

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

Remember that 1m = 100cm

Half metre = ?

Record of Bobby A. for high jump = 1m 91 cm

Centimetres required to reach 2 m = 2m – 1m 91cm

= 9 cm

3). Galina’s long jump is nearly

a). 7 metres

b). 7 and a half metres

c). 8 metres

Answer:

Option b. (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?

Women’s World Record for long jump = 7m 52cm

Women’s World Record for high jump = 2m 9cm

Difference = 7m 52 cm – 2m 9 cm

= 5 m 43 cm

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

Record of Mike P’s long jump = 8m 95 cm

Centimetres required to reach 9 metres = 9m – 8m 95cm

= 5 cm

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

a). Stefla K.

b). Chandra Pal

c). Javier S

d). Bobby A.

The jump of Javier S. is very close to two and a half metres.

Page 19

The doctor has told Devi Prasad to run 2 km everyday to stay fit. He took one round of this field. How far did he run?

Length of the field = 500 + 500 + 500 + 500

= 2000 m *(1000 m = 1 km)*

= 2 km

He ran 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 Devi Prasad run to complete 2 km?

The distance Devi Prasad run every day = 2 km

= 2000 m

The boundary of the park = 400 m

Number of rounds = 2000 ÷ 400

= 5

Devi Prasad has to run 5 rounds to complete 2 km.

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 ________ metres!

The boundary of the park = 400 m

Number of rounds = 8

Distance ran by Devi Prasad = 400 X 8

= 3200 m

= 3000 + 200

= 3 km 200m

The Qutub Minar is 72 metres high. About how many metres high is your classroom?

Height of my classroom = __3__ m

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

Number of rooms = 21

Page 20

Subodh is going to Kozhikode which is 24 kilometres (km) away. Manjani is going to Thalassery which is 46 km away in the opposite direction.

How far is Kozhikode from Thalassery?

Distance of Kozhikode from Thalassery = 24 + 46

= 70 km

Momun comes to school from very far. 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 metres wide green field. Then he carefully crosses the 40m wide road to reach his school.

How much does Momun walk every day to reach shool

= 400 + 150 + 350 + 40

= 940 m

Is it more than 1 km?

No, it is less than 1 km.

Page 21

*(*)*

Find out how far your friends live from school and fill the table.

Friend’s Name | Distance of home from the school |

Ayush | 400 m |

Vinay | 2 km 600 m |

Ajay | 6 km 300 m |

Nilesh | 1 km 200 m |

Amit | 2 km 800 m |

Write in metres or kilometers.

Who among you lives nearest to the school?

Ayush lives nearest to the school.

Who lives farthest from the school?

Ajay lives farthest to the school.

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

Only one student lives less than 1 kilometre away from my school.

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

Yes, Ajay lives more than 5 km away from the school.

How did they come to school?

He comes to school by rickshaw.

1). How long is the thread in a reel?

It may be 50m or 100 m.

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

The length of the string of a kite reel comes in different measurements. It may be 1000m 1500m and 2000m.

Yes, it can be more than a kilometer long.

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

If a handkerchief is made out of a single thread, then the length of the handkerchief may be about 4 to 5 thousands metre.