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
Text Solution
Verified by ExpertsThe correct answer is:
B
Boat covers distance of 16km in a still water in 2 hours.
i.e. 
Now velocity of water 
.
Time taken for going upstream
(As water current oppose the motion of boat)
Time taken for going down stream
(As water current helps the motion of boat)
Total time 
or 2hr 40min
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