Draw a figure to answer

An airplane is ying horizontally at an altitude of 9000 m. An observer on the ground noticed that when the angle of elevation of the plane is 60, the angle decreases at the rate of 0.15 rad/sec . What is the velocity of the airplane? DRAW AND ANSWER. A pole 25 feet long is carried horizontally along a corridor 15 feet wide and into a second at right angles to the rst. How wide must second corridor be? DRAW AND