# Plane Speed Relative to Ground

1. Sep 28, 2015

### Euler2718

1. The problem statement, all variables and given/known data

The compass in a plane indicates that the plane is pointed due east; its air speed indicator reads 212 km/hr. There is a steady wind blowing from the north with a speed of 60.0 km/hr. What is the speed of the plane with respect to the ground?

2. Relevant equations

$$\sqrt{c^{2}_{x} + c^{2}_{y} } = |c|$$

I think

3. The attempt at a solution

I tried setting up a right triangle but nothing works. Can someone point me in the right direction, I'm very frustrated.

2. Sep 28, 2015

### RUber

What are you using for c_x and c_y in your equation? That appears to be the right way to approach this problem.

3. Sep 28, 2015

### Euler2718

Yeah the online submission was broken. The answer was 220 km/hr, but it would only take 219 km/hr as the answer. All good now.