a boat takes 4 hours for travelling downstream from point a to point b and com

Question

a boat takes 4 hours for travelling downstream from point a to point b and coming back to pint a upstream. if the velocity of the stream is 2 km/hr and the speed of the boat in still water is 4 km/hr.

Options:

A . 6 Km

B . 7 Km

C . 9 Km

D . 8 Km

Answer: Option C
Explanation :

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