The speed of a boat in still water is 70kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?\nOptions:\n(A) 22 kmph\n(B) 40 kmph\n(C) 78 kmph\n(D) 50 kmph\n(E) 23 kmph Let's think first. Stream of consciousness:
User
Speed downstream = 70 + 20 = 90 kmph\nSpeed upstream = 70 - 20 = 50 kmph
So, the answer is (D).
Assistant