A ferry is crossing a river. The ferry is headed due north with a speed of 4.8 m/s relative to the water. If the river's velocity is 2.1 m/s east, what will the ferry's velocity be relative to an on-shore observer?


Select one:



a.5.2 m/s at 24° E of N


b. 4.9 m/s at 28° E of N


c. 4.9 m/s at 62° E of N


d. 5.2 m/s at 28° E