A man crosses the river perpendicular to river in time t seconds and travels an equal distance down the stream in T seconds. The ratio of man's speed in still water to the river water will be:

A man rows across a flowing river in time t_(1) and rows an equal distance downstream in time t_(2) . Calculate the ratio t_(1):t_(2) if the speed of man in still water is 5 m//s and speed of stream is 3m//s .

A boat travels with a speed of 15km/hr in still water.If a river flowing at 5km/hr ,the boat travels some distance downstream and then returns.The ratio of average speed to the speed in still water is

A river is running at 2 km/hr. It took a man twice as long to row up as to row down the river. The rate (in km/hr) of the man in still water is

An observer on ground sees a boat cross a river of width 800 m perpendicular to its stream in 200 seconds. He also finds a man on a raft floating at speed of 3 m/s with river. The distance travelled by boat as seen by man on the raft in crossing the river is -

An observer on ground sees a boat cross a river of width 800 m perpendicular to its stream in 200 seconds. He also finds a man on a raft floating at speed of 3 m/s with river. The distance travelled by boat as seen by man on the raft in crossing the river is -

An observer on ground sees a boat cross a river of width 800 m perpendicular to its stream in 200 seconds. He also finds a man on a raft floating at speed of 3 m/s with river. The distance travelled by boat as seen by man on the raft in crossing the river is -

A man swins in a river with and against water at the rate of 15 kmh ^(-1) and 5 kmh^(-1) . Find the man's speed in still water and the speed of the river.

A man can row upstream at 15 km/h and down stream at 21 km/h the speed of water current of the river is: