Challenge An airplane is preparing to land at an airport. It is 42,700 feet above the ground and is descending at the rate of 3,400 feet per minute. At the same airport, another airplane is taking off and will ascend at the rate of 2,700 feet per minute. When will the two airplanes be at the same altitude and what will that
altitude be? Use pencil and paper. Use two other methods to solve the problem. Explain which methods are easier to use and which are more difficult to use for the
situation.
They will be at the same altitude in minutes, when their altitude will be
feet.