Question:
In one hour, a boat goes 13 km/hr in the direction of the stream and 7 km/hr against the direction of the stream. What will be the speed of the boat in still water?
A8 km/hr
B10 km/hr
C14 km/hr
D6 km/hr
Answer:
B. 10 km/hr
Explanation:
Speed of a boat in still water = ½ (DownstreamSpeed + UpstreamSpeed) Speed of boat in still water = ½ (13+7) = ½ × 20 = 10 km/hr