A boat takes two hours to travel 8 km and back in still water. If the velocity of water 4 kmh−1 , the time taken for going up stream 8km and coming back is

A boat takes two hours to travel 8 km and back in still water. If the velocity of water 4 kmh−1 , the time taken for going up stream 8km and coming back is

Question : A boat takes two hours to travel 8 km and back in still water. If the velocity of water 4 kmh−1 , the time taken for going up stream 8km and coming back is

(A) 2h

(B) 2 h 40 min

(C) 1 h 20 min

(D) Cannot be estimated with the information given