A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:

A) 5 km/h

B) 4 km/h

C) 3 km/h

D) 1 km/h

Suppose he moves 4 km downstream in x hours. Then,
Speed downstream (4/x​) km/hr
Speed upstream (3/x) km/hr
 or So, Speed downstream = 8 km/hr, Speed upstream = 6 km/hr.
Rate of the stream 

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