Question
The speed of the boat in still water is 10 km/h
and the speed of the stream is 6 km/h. A boat goes 48 km downstream with its usual speed but at the time of returning the speed of the boat in still water is tripled. Find the total time taken by boat to cover the whole distance.Solution
The mating of animal with wider degree of relativity than selective for close breeding is called asÂ
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