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Question
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.
So, if you run a marathon on a stadium track, you will have to complete ______ rounds!
Options
20
10
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Solution
So, if you run a marathon on a stadium track, you will have to complete 10 rounds!
Explanation:
The number of rounds to be completed
= (40 x 100) ÷ 400
= 4000 ÷ 400
= 10
You have to complete 10 rounds of stadium track.
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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 metres race people run ______ km.
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
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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!
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 40 metres wide road to reach his school.

- How much does Momun walk every day to reach school?
- Is it more than 1 km?
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