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A 100 m long train, takes 7 1/5 secon...

A 100 m long train, takes `7 1/5` seconds to cross a man walking at the rate of 5 km/hr in the direction opposite to that of the train. What is the speed of the train?

A

54 km/hr

B

45 km/hr

C

42 km/hr

D

36 km/hr

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The correct Answer is:
B
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