Q) a plane is flying horizontally at an altitude of 1.5 miles and a speed of 400 mph. it is on a linear path that will take it directly over a radar station. find the rate at which the distance from the plane to the radar station is changing when the plane is exactly 2.5 miles from the station.
I know the answer is -320 mph, but i don't know how to get it.
I know the answer is -320 mph, but i don't know how to get it.