A man rows his boat 84 km downstream and 48 km upstream, taking 2 hours each time. Find the speed of the stream?\nOptions:\n(A) 6 kmph\n(B) 5 kmph\n(C) 9 kmph\n(D) 8 kmph\n(E) 1 kmph Now, let's think a bit. Some random thoughts:
User
Speed downstream = d/t = 84/(2) = 42 kmph\nSpeed upstream = d/t = 48/(2) = 24 kmph\nThe speed of the stream = (42 - 24)/2 = 9 kmph
The final answer: (C).
Assistant