Question

The train travelling at 72kmph crosses a platform in 30 seconds and a man standing on the platform in 18 seconds. what is the length of the platform

Answer 1

Length of the platform = speed of train * extra time taken to cross the platform.

Length of platform = 72 kmph * 12 seconds

Convert 72 kmph into m/sec

1 kmph = 518 m/s (This can be easily derived. But if you can remember this conversion, it saves a good 30 seconds).

∴ 72 kmph = 518∗72 = 20 m/sec

Therefore, length of the platform = 20 m/s * 12 sec = 240 meters.

Answer 2

your answer :-240m
if understand then please marks as brainlist answer and give thanks ⛧⛧⛧⛧✔✔