Question

A swimmer sets off headed west at 0.40 m/s directly towards the opposite shore of a swift river. The swimmer makes it to the opposite shore 30 meters downstream of their expected position. If the river is 7.5 meters wide, what is the velocity of the water relative to the shore?

Answer 1

Answer:

Explanation:

River is 7.5 m wide . Time taken by it cover this displacement

= displacement / velocity

=  7.5 / 0.4  

= 18.75 s

During this period , swimmer  will have a displacement of 30 m due to velocity of river water .

Displacement of 30 m downstream will be due to flow of river .

velocity of water flow = displacement / time

= 30 / 18.75

= 1.6 m /s