A boat takes two hours to travel 8 km and back in still water. If the velocity of water is 4 km/h, the time taken for going upstream 8 km and coming back is
A. `2h`
B. `2h 40` min
C. `1h 20 `min
D. cannot be estimated with the information given
A. `2h`
B. `2h 40` min
C. `1h 20 `min
D. cannot be estimated with the information given
Correct Answer – B