MATHHHHHHHHHHHH PLEASEEEE!!?

The drag force F on a boat varies jointly with the wet surface area A of the boat and the square of the speed S of the boat. A boat with a wet surface area of 72ft^2 traveling at 12.5mph experiences a drag force of 675N . Find the speed of a boat experiencing a drag force of 384N and having a wet surface area of 25ft.