00:01
A plane flies due west at 250 kilometers an hour.
00:05
So we're going to have a plane going to do west, and that's at 250.
00:10
And then it has a wind blows south at 70 kilometers an hour.
00:14
So it's going to go south at 70.
00:17
So the wind's going to end up pushing the plane off that westerly course.
00:22
So we want to know the velocity and direction of the plane.
00:26
So nice thing about this is we have this right angle.
00:30
So we can then find the angle here, which is going to indicate our direction, and then we can find our distance here, which is going to indicate the velocity.
00:40
So let's go d squared.
00:42
It's going to be 70 squared plus 250 squared.
00:47
So d is going to be the square root of that expression.
00:53
Let's go get that real quick...