A boat travels 24 km upstream in 6 hours and 20 km downstream in 4 ho…

Question

A boat travels 24 km upstream in 6 hours and 20 km downstream in 4 hours. Then the speed of boat in still water and the speed of current are respectively.

Accepted Answer

Option B. 4.5 kmph and 0.5 kmph. Answer & Solution Answer: Option B Solution: & Upstream speed, U & = 246 = 4\,km/h & Downstream speed , D & = 204 = 5\,km/h & Speed of boat in still water , x & = D + U2 = 9/2 = 4.5\,km/h & Speed of water current, y & = D - U2 = 1/2 = 0.5\,km/h