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A ship sails out to a mark at the rate o...

A ship sails out to a mark at the rate of 15kmph and sails back at the rate of 10kmph the average rate of sailing is

A

A)5km/hr

B

B)12 km/hr

C

C)12.5km/hr

D

D)25km/hr

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The correct Answer is:
B
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