A man rows to a place 48 km distance and 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:	Choose the correct choice from the following choices
A) 1 km/hr  B) 2.5 km/hr  C) 3 km/hr  D) 4 km/hr  E) None
Sol.   Suppose he moves 4 km downstream in x hours. Then,   Speed downstream = [4/x] km/hr, Speed upstream = [3/x] km/hr.   ∴ 48/(4+x) + 48/(3/x) = 14 or x = 1/2.   So, Speed downstream = 8 km/hr, Speed upstream = 6 km/hr.   Rate of the stream = 1/2 (8-6) km/hr = 1 km/hr.   1 km/hrnswer 1 km/hr
<result>A</result>
A man rows to a place 48 km distance and 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: