(Flying a kite) A man is flying a kite. He holds the string 1.5 meters above the level ground, and the string is paid out at a rate of 2 meters per second as the kite moves horizontally at an altitude of 51.5 meters. Assuming there is no sag in the string. nd the rate at which the kite is moving horizontally when there are 80 meters of cord out? [Pulling a rope) A man on a wharf 12 meters above the level of water is pulling a rope tied to a boat at the rate of 2 meters per minute. How fast is the boat approaching the wharf when there are 20 meters of rope out