A man rows his boat 120 km downstream and 92 km upstream, taking 4 hours each time. Find the speed of the stream?\nOptions:\n(A) 6 kmph\n(B) 4 kmph\n(C) 2 kmph\n(D) 8 kmph\n(E) 1 kmph Stream of consciousness first, then make a decision:
User
Speed downstream = d/t = 120/(4) = 30 kmph\nSpeed upstream = d/t = 92/(4) = 23 kmph\nThe speed of the stream = (30 - 23)/2 = 4 kmph
Thus, the answer is (B).
Assistant