Question
A boat covers 24 km upstream in 4 hours and 42 km downstream in 3 hours. What is the speed of the stream?
Solution
Upstream speed = 24/4 = 6 km/h Downstream speed = 42/3 = 14 km/h Speed of stream = (Downstream speed - Upstream speed)/2 = (14 - 6)/2 = 4 km/h
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