Posted by math on .
(Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it
directly over a radar tracking station (on ground). If the distance D between the plane and the radar is
decreasing at a rate of 300 km/hr, find the speed of the plane when D remains 10 km.

Airplane & Radar 
Anonymous,
what is the doppler shift when tracking a car moving away from 1ghz radar at 100 km/hr