Question
A boat can travel 24 km upstream and 30 km downstream in
4 hours. Find the speed of the boat in still water if the speed of the stream is 3 km/h.Solution
ATQ, Let the speed of the boat in still water be ‘x’ km/h. Upstream speed = ‘x – 3’ km/h Downstream speed = ‘x + 3’ km/h According to the question: 
Thus, the speed of the boat in still water is 14 km/h .
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