A ferry is crossing a river. The ferry is headed due north with a speed of 2.9 m/s relative to the water and the river’s velocity is 3.2 m/s to the east.

Question

A ferry is crossing a river. The ferry is headed due north with a speed of 2.9 m/s relative to the water and the river’s velocity is 3.2 m/s to the east.
What is magnitude of the boat’s velocity??