Question
A boat goes 220 km downstream in 11 hours, and 135 km
upstream in 15 hours. The speed of the stream is ÂSolution
Distance downstream= 220 km Time taken to row downstream = 11 hrs. therefore, speed downstream = 220/11 = 20 km/hr Distance upstream = 135 km Time taken to row upstream = 15 hrs therefore, speed upstream = 135/15 = 9 km/hr therefore, speed of the stream = 1/2 (20 - 9) = 5.5 km/hr
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