Question
A boat can travel 18 km downstream in 2 hours and 12 km
upstream in 3 hours. What is the speed of the boat in still water?Solution
Speed downstream = Distance/Time = 18/2 = 9 km/hr Speed upstream = Distance/Time = 12/3 = 4 km/hr Speed of boat in still water = (Downstream speed + Upstream speed) / 2 = (9 + 4) / 2 = 13/2 = 6.5 km/hr Correct Option: a) 6.5 km/hr
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