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A boat can travel with a speed of 13km/hr in still water if the speed of the stream is4 km/hr find the time taken by the boat to go 68 km downstream |
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Answer» t = 4 h Explanation: We're asked to find the time t it takes a boat to travel 68 km . We know: SPEED of boat with respect to earth: 13 km/h speed of stream with respect to earth: 4 km/h We're given that the boat travels DOWNSTREAM, i.e. with the CURRENT, so the NEW speed of the boat is 13 km/h + 4 km/h = 17 km/h The time to travel 68 km with this speed is thus t = 68 km 17 km h = 4h
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