Solving River Flow Velocity: A Motorboat Problem

[abhikesbhat]

Homework Statement

A motorboat is going downstream overcame a raft at a Point A; t=60 min later it turned back and after some time passed the raft at a distance l=6km from point A. Find the flow velocity assuming the duty of the engine to be constant.

Homework Equations

Average Speed,Displacement, Average Velocity

The Attempt at a Solution

I drew a picture and got confused. I think I don't understand the question.

 

[tiny-tim]

A motorboat is going downstream overcame a raft at a Point A; t=60 min later it turned back and after some time passed the raft at a distance l=6km from point A. Find the flow velocity assuming the duty of the engine to be constant.

Hi abhikesbhat!

The raft is moving at the same speed as the river.

The boat is moving at a fixed speed relative to the river.

Call that fixed speed v, and the time for the second part of the boat's journey T, and write a couple of equations for v and T.