The sum of the speeds of a boat in still water and the speed the current is 10 kmph. If the boat takes 40% of the time to travel downstream when compared to that upstream. Then find the difference of the speeds of the boat when travelling upstream and down stream. 

A) 4 kmph 

B) 6 kmph

C) 8 kmph 

D) 5 kmph

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1 Answers

Correct option is B) 6 kmph

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