Question 65

A train passes a platform in 36 seconds and a man standing on the platform in 20 seconds. If
the speed of the train is 54 km/h, what is the length of the platform?

Solution

Let the length of train L and length of platform P

speed of train 54 km/h =54*5/18 m/s =15 m/s

it passes man on platform in 20 sec so

L=20*15=300m (distance =speed*time)

now when it crosses the platform effective distance becomes L+P

hence , L+P= 36*15 =540 m

P=540-L=540-300=240 m

The length of the platform= 240 m

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A train passes a platform in 36 seconds and a man standing on the platform in 20 seconds. Ifthe speed of the train is 54 km/h, what is the length of the platform?