Question
A boat takes 6 hours to travel 48 km upstream and 3
hours to travel 60 km downstream. What is the speed of the boat in still water?Solution
ATQ, Upstream speed = 48 / 6 = 8 km/h Downstream speed = 60 / 3 = 20 km/h Let boat speed in still water = b, stream speed = s b – s = 8 b + s = 20 Add: 2b = 28 → b = 14 km/h.
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