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If a boy takes as much time in running 10 m as a car takes in covering 25 m, the distance covered by the boy during the time the car covers 1 km, is?

400 m.
40 m.
250 m.
650 m.

Correct Answer: 400 m.

Explanation:

Let distance covered by boy is Y.
Then, 25 : 10 : : 1000 : Y
⇒ Y = (10 x 1000)/25 = 400 m

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