question_answer

The sum of the speeds of a boat in still water and the speed the currents is 10 kmph. If the boat takes 40% of the time to travel downstream when compared to that upstream, then finds the difference of the speeds of the boat when travelling upstream and downstream,

A)  3 kmph                        

B)  6 kmph  

C)  4 kmph            

D)  5 kmph