A river flows due east at 1.54 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 11.2 m/s due north relative to the water. What is the velocity of the boat relative to shore?

Answer 1

speed=sqrt(1.54^2 + 11.2^2)
direction: arctan(11.2/1.54) relative to shore