Question
The speed of the stream is 14 km/h. Boat βAβ covers
130 km distance against the stream in 5 hours and boat βBβ covers 100 km distance against the stream in 4 hours. The speed of boat βBβ in still water is how much percent of the speed of boat βAβ in still water?Solution
Speed of boat βAβ upstream = 130/5 = 26 km/h Speed of boat βBβ upstream = 100/4 = 25 km/h Speed of the boat βAβ in still water = 26 + 14 = 40 km/h Speed of the boat βBβ in still water = 25 + 14 = 39 km/h Required percentage = (39/40) Γ 100 = 97.5%
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