Question
A boat covered 192 km along the stream in 6 hours and 120 km against the stream in 6 hours. Find the speed of boat in still water.
Solution
Downstream speed = (192/6) = 32 km/h Upstream speed = (120/6) = 20 km/h Speed of boat in still water = (32 + 20) ÷ 2 = 26 km/h
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