Question
A boat covers 440 km downstream in 20 hours. If in still
water it covers 196 km in 14 hours, then find the time required to travel 420 km upstream.Solution
ATQ, Downstream speed = 440 / 20 = 22 km/hr Speed of boat in still water = 196 / 14 = 14 km/hr Speed of water = 8 km/hr Upstream time to cover 420 km: 420 / 6 = 70 hours
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