A man rows his boat 80 km downstream and 38 km upstream, taking 3 hours each time. Find the speed of the stream?\nOptions:\n(A) 6\n(B) 9\n(C) 7\n(D) 8\n(E) 2 Stream of consciousness:
User
Speed downstream = d/t = 80/(3) = 27 kmph\nSpeed upstream = d/t = 38/(3) = 9 kmph\nThe speed of the stream = (27 - 9)/2 = 9 kmph
Thus, the answer is (B).
Assistant