Vector Question: Swimmer Across River Diagram Help

[Apollonian]

Homework Statement

A swimmer heads across a river flowing at 7km/h.
Her speed relative to the water is 8km/h.
The river is 362m wide.
There are other questions; however, I just need help with the diagram.

Homework Equations

The Attempt at a Solution

I'm not too sure on how to draw the diagram- I made a right angle triangle with the bank as shown in the picture. Is this correct?

 

[AJ Bentley]

Not quite.

The river is flowing (right) at 7km/hr
The swimmer moves (diagonally) at 8km/hr

So you can calculate how fast the swimmer is moving directly across the river by drawing a triangle of velocities.

Once you've got the speed it's easy.

 

[Apollonian]

Oh I see what you mean, i wasn't sure if relative to implied it was the true course. Thank you.