Question

a train is running at the rate of 40kmph , a man is going in the same direction parallel to the train at 25kmph. if the train cross the man in 48sec. then length of the train is ?

Answer 1

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Answer 2

RELATIVE VELOCITY = 40-25 = 15 KMPH

CHANGING KMPH INTO MS

THAT IS,

15×5/18 = 75/18 = 25/6 M/S.

VELOCITY×TIME = LENGTH

$\frac{25}{6} \times 48 = 25 \times 8 = 200 \: metres$

LENGTH OF TRAIN IS 200 METRES.

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