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 travelling?

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

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 travelling?
A.	55 kmph
B.	57 kmph
C.	60 kmph
D.	63 kmph
Answer» D. 63 kmph

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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 travelling?

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