A man standing on a 170 metre long platform watches that a train takes71seconds to pass him and 21 seconds to cross2 the platform. Find the speed of train.

A man standing on a 170 metre long platform watches that a train takes

1.	A man standing on a 170 metre long platform watches that a train takes71seconds to pass him and 21 seconds to cross2 the platform. Find the speed of train.
A.	12.5 m/sec.
B.	None of these
Answer» B. None of these

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A man standing on a 170 metre long platform watches that a train takes71seconds to pass him and 21 seconds to cross2 the platform. Find the speed of train.

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