Question
Mr. Arun rows a boat with the stream at 10 km/hr and
against the stream in 5 km/hr. In still water, his rate of rowing in km/h is:Solution
Let the man's speed is 'x' and that of stream flow is 'y'. Then, x + y = 10 ----- (i) => x - y = 5 ------ (ii) Solving (i) and (ii) we get, => x = 7.5 km/hr
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