The speed of a boat downstream is 15 km/hr and the speed of the stream is 1.5 km/hr. The speed of the boat upstream is?

Question

Accepted Answer

Let the speed of boat in still water be x km/hr Then, x + 1.5 = 15 ⇒ x = 13.5 ∴ Speed upstream = (13.5 - 1.5) km/hr = 12 km/hr

Discussion & Comments