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
Answer : option (B)
Solution :
