The speed of a swimmer is 4 km h−14 km h-1 in still water. If the swimmer makes his strokes normal to the flow of river of width 1 km1 km, he reaches a point 750 m750 m down the stream on the opposite bank. The speed of the river water is

A person swims in a river aiming to reach exactly on the opposite point on the bank of a river. His speed of swimming is 0.5 m/s at an angle of 120∘ with the direction of flow of water. The speed of water is1.0 m/s0.5 m/s0.25 m/s0.43 m/s

A swimmer's speed with respect to still water is 77 m/s. She wants to cross a river 111111 m wide and with a current at 11 m/s speed. If an observer at the shore sees that the path is straight across the river, how long does it take for the swimmer to get to the other side of the river? What upstream angle does she need to swim directly to the other side?

A man can swim at the rate of 5kmh−1 in still water. A 1−km wide river flows at the rate of 3 km h−1. The man wishes to swim across the river directly opposite to the starting point. How much time will he take to cross the river

Brandon is on one side of a river that is 5050 m wide and wants to reach a point 200200 m downstream on the opposite side as quickly as possible by swimming diagonally across the river and then running the rest of the way. Find the minimum amount of time if Brandon can swim at 22 m/s and run at 66 m/s.(We assume that the speed of the water is negligible compared with the speed at which Brandon swims.)(Use decimal notation. Give your answer to two decimal places.)

Jenny was swimming in a river. She swam a total of 1,000meters downstream at a constant velocity. She swam one-quarter of that distance in 5minutes. What was her velocity?