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 boat takes 2 hours to travel 8 km and back in still water lake.With water velocity of 4 kmph ,the time taken for going upstream of 8km and coming back is

A boat takes 2 hours to travel 8 km and back in still water lake.With water velocity of 4 kmph ,the time taken for going upstream of 8km and coming back is

A man can swim 5 km/h in still water. If the speed of current be 3 km/h, the time taken by him to swim to a place 16 km upstream and back is :

A man can swim 5 km/h in still water if the speed of current be 3 km/h the time taken by him to swim to a palce 16 km upstream and back is:

If the speed of a boat in still water is 8 km/h and the rate of stream is 4 km/h, then find upstream speed of the boat.

A boat take 6 hours to travel 36 km downstream and 24 km upstream. It take 9 hours to travel 48 km downstream and 40 km upstream. Find the speed of the stream and that of boat in still water.