Question
The speed of the stream is 14 km/h. Boat ‘A’ covers
64 km distance against the stream in 4 hours and boat ‘B’ covers 95 km distance against the stream in 5 hours. The speed of boat ‘B’ in still water is how much percent of the speed of boat ‘A’ in still water?Solution
Speed of boat ‘A’ upstream = 64/4 = 16 km/h Speed of boat ‘B’ upstream = 95/5 = 19 km/h Speed of the boat ‘A’ in still water = 16 + 14 = 30 km/h Speed of the boat ‘B’ in still water = 19 + 14 = 33 km/h Required percentage = (33/30) × 100 = 110%
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