4.25 A inboard jet boat takes in water through side vents and ejects it through a nozzle at the stern. The drag on the boat is given by Fdrag =kV2, where V is the boat speed and k is a constant that is a function of boat size and shape. For a boat with a nozzle diameter of 75 mm, a jet speed of 15 m/s, and a boat speed of 10 m/s, determine the constant k. Determine the boat speed when the jet speed is increased to 20 m/s.