Question: A man rows his boat 72 km downstream and 30 km upstream, taking 3 hours each time. Find the speed of the stream?\nOptions:\n(A) 6 kmph\n(B) 5 kmph\n(C) 2 kmph\n(D) 8 kmph\n(E) 7 kmph Let's think first. Some random reasoning:
User
Speed downstream = d/t = 72/(3) = 24 kmph\nSpeed upstream = d/t = 30/(3) = 10 kmph\nThe speed of the stream = (24 - 10)/2 = 7 kmph The final answer: (E).
Assistant