Diane rows a boat at 8.0 m/s directly across a river that flows at 6.0 m/s. a. what is the resultant speed of the boat?

The resultant velocity is the vector sum of the two velocity vectors.

Let the boat move east (x-axis)  so that its velocity is

Let the river flow north (y-axis), so that its velocity is


The magnitude of the resultant velocity is 


  10 m/s

My answer is opptionc, just check with anyone else