I'll give you a question, please answer with step-by-step reasoning process.
The speed of a boat in still water is 50kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?\nOptions:\n(A) 40, 68 kmph\n(B) 40, 30 kmph\n(C) 70, 30 kmph\n(D) 40, 60 kmph\n(E) 20, 60 kmph

(C)
Speed downstream = 50 + 20 = 70 kmph\nSpeed upstream = 50 - 20 = 30 kmph.

So, the answer is (C)