A boat moving upstream takes 8 hours 48 minutes to cover a distance while it takes 4 hours to return to the starting point, downstream. What is the ratio of the speed of boat in still water to that o…

Question

A boat moving upstream takes 8 hours 48 minutes to cover a distance while it takes 4 hours to return to the starting point, downstream. What is the ratio of the speed of boat in still water to that of water current?

PYQPulse · Accepted Answer

c. 8 : 3

PYQPulse · Answer

Explanation: Let the speed of the boat be x km/h And the speed of the stream be y km/h Distance travel in Upstream is = (x - y) × 8(4/5) = (x - y) × 44/5 Distance travel in Downstream is= (x + y) × 4 Since the distance is the same – (x - y) x 44/5 = (x + y) x 4 11x - 11y = 5x + 5y 6x = 16y x/y = 8/3 x: y=8:3

A boat moving upstream takes 8 hours 48 minutes to cover a distance while it takes 4 hours to return to the starting point, downstream. What is the ratio of the speed of boat in still water to that of water current?

Answer: C. c. 8 : 3

Explanation