Question
A motorboat covers 600 km downstream in 25 hours. If it
can cover 240 km in still water in 12 hours, then find the time taken by the boat to cover 840 km upstream.Solution
ATQ, Downstream speed = 600 / 25 = 24 km/hr Speed of boat in still water = 240 / 12 = 20 km/hr Speed of water = 4 km/hr Upstream time to cover 840 km: 840 / 16 = 52.5 hours
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