The top of the cliff is 40 meters higher than a nearby airport, and the horizontal distance from the end
of the runaway is 325 meters from a point directly below the cliff. An airplane takes off at the end of
the runway in the direction of the cliff, at an angle that is to be kept constant until the hill passes. If
the pilot wants to clear the hill by 40 meters, what is the angle elevation to the top of the cliff from the
airplane at the beginning of the runway?