A man can swim directly a stream of width `100m` in `4` minutes, when there is no current of water and in `5 minutes` when there is current of water.The velocity of the current of water in the stream is

A man swims relative to water with a velocity greater than velocity of water. Then

A man rows upstream 12 km and downstream 28 km taking 5 hours each time. The velocity of water current is:

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:

A boatman can row 2 km against the stream in 20 minutes and return in 18 minutes. Find the rate of current.

Unable to swim against water stream -

A person aiming to reach exactly opposite point on the bank of a stream is swimming with a speed of 0.6 m/s at an angle of 120^(@) with the direction of flow of water . The speed of water in the stream is