1.

A man takes four times as long to row up as to row down the river. If the rate of river is 6 kmh"1 what is the rate of the man in still water ?

Answer»

10 kmph



Let the SPEED of the man in still WATER be V kmh-1
∴ (V + 6) = 4(V- 6)
∴ V + 6 = 4V - 24
∴ 3V = 30
∴ V = 10 kmh-1



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