Relative Velocity: How Far Will the Boat Move Downstream Without Correction?

[AimlessWander]

Homework Statement

A river flows with a velocity of 3 m/s east. The river is 300 m wide. A boat is moving 10 m/s due north. If the river flow is not corrected for, how far will the boat have moved downstream by the time is reaches the far shore?

Homework Equations

Trigonometry and kinematic equations

The Attempt at a Solution

90 m?

 

[Simon Bridge]

Cool - how did you arrive at that figure?