The speed of a boat in still water is 50kmph and the speed of the current is 20kmph. Find the speed and upstream?
Select the correct option.
A) 30 kmph B) 40 kmph C) 78 kmph D) 15 kmph E) 23 kmph

Rationale: speed downstream = 50 + 20 = 70 kmph speed upstream = 50 - 20 = 30 kmph answer : a
Answer: A