Advertisements
Advertisements
Question
Running Exercise
The doctor has told Devi Prasad to run 2 km every day to stay fit. He took one round of this field. How far did he run?
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?
- 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!
Advertisements
Solution
Devi Prasad ran one round the field
= 500 m + 500 m + 500 m + 500 m
= 2000 m
= 2000 ÷ 1000 km
= 2 km
(1) 2 km = 2 × 1000 m
= 2000 m
So to complete 2000 m, Devi Prasad must complete
= 2000 m ÷ 400 m
= 5 rounds
Devi Prasad has to run 5 rounds of the park.
(b) Devi Prasad covers a distance in 8 rounds = 400 m × 8
= 3200 m
= 3000 m + 200 m ...(3000 m = 3000 ÷ 1000 = 3 km)
= 3 km 200 m
That every day he ran 3 km and 200 m.
APPEARS IN
RELATED 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 farthest from each other? Check your answer.
- Which two dots are nearest to each other? Check your answer.
Imagine-
- Could that person pass through the door of your classroom without bending?
- Will his head touch the roof of your house if he stands straight?
Here are the Indian Records and World Records for some jumps.
| Sports | World Record | Indian Record |
| High Jump (Men) | Javier S. (2m 45 cm) | Chandra Pal (2m 17 cm) |
| Long Jump (Men) | Mike P. (8m 95 cm) | Amrit Pal (8m 8 cm) |
| High Jump (Women) | Stefka K. (2m 9 cm) | Bobby A. (1m 91 cm) |
| Long Jump (Women) | Galina C. (7m 52 cm) | Anju G. (6m 83 cm) |
Find out from the table -
Galina's long jump is nearly ______.
Here are the Indian Records and World Records for some jumps.
| Sports | World Record | Indian Record |
| High Jump (Men) | Javier S. (2m 45 cm) | Chandra Pal (2m 17 cm) |
| Long Jump (Men) | Mike P. (8m 95 cm) | Amrit Pal (8m 8 cm) |
| High Jump (Women) | Stefka K. (2m 9 cm) | Bobby A. (1m 91 cm) |
| Long Jump (Women) | Galina C. (7m 52 cm) | Anju G. (6m 83 cm) |
Find out from the table -
Look at the Women's World Records. What is the difference between the longest jump and the highest jump?
How high can a plane fly? Can it fly higher than Mount Everest which is about 9 km high?
Look for things that are about 10 cm long.
Guess the length of different parts of your body and check if your guess is correct. You can use a scale, string, measuring tape etc.
Which of these will be in centimetres and which will be in metres?
Waist of an elephant
Which of these will be in centimetres and which will be in metres?
Height of your mother
The animals in the picture had a competition. The animal who had the longest tail won a prize. Now who do you think won the first prize and who won the second? Just guess the length of the longest tail.
