Question

Time taken by a man to row upstream is 3/2 times
taken by him to row downstream. If the product of
the speeds of the man and the stream (both in
kmph) is 20, the speed of man in still water
s
kmph.​

Answer 1

Answer:

7

Step-by-step explanation:

Man's rate downstream=x km/hr. Man's rate downstream= 2x km/hr. Man's rate in still water= 1/2 (x+2x) km/hr. Therefore, 3x/2=42=> x=42×2/3=28km/hr. Man's rate downstream = 42 km/hr. Man's rate upstream = 28 km/hr. Therefore rate of stream= 1/2 (42-28)=7 km/hr.

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