Question
The speed of the stream is 14 km/h. Boat ‘A’ covers
130 km distance against the stream in 5 hours and boat ‘B’ covers 100 km distance against the stream in 4 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 = 130/5 = 26 km/h Speed of boat ‘B’ upstream = 100/4 = 25 km/h Speed of the boat ‘A’ in still water = 26 + 14 = 40 km/h Speed of the boat ‘B’ in still water = 25 + 14 = 39 km/h Required percentage = (39/40) × 100 = 97.5%
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