A man in a train notices that he can count 21 telephone posts in one minute. If they are known to be 50 meters apart, then at what speed is the train running?

A man in a train notices that he can count 21 telephone posts in one m

1.	A man in a train notices that he can count 21 telephone posts in one minute. If they are known to be 50 meters apart, then at what speed is the train running?
A.	57 km/hr
B.	55 km/hr
C.	63 km/hr
D.	60 km/hr
Answer» E.

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A man in a train notices that he can count 21 telephone posts in one minute. If they are known to be 50 meters apart, then at what speed is the train running?

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