A boat is rowed perpendicular to the shore of a river that flows at 3.0 m/s as shown in the
figure. The velocity of the boat is 4.0 m/s relative to the water. What is the magnitude of the
velocity of your boat relative to the shore?
A-5 m/s
B-10 m/s
C-15 m/s
D-20 m/s