A road running north to south crosses a road going east to west at the point P . Car A is driving north along the
A road running north to south crosses a road going east to west at the point P Car A is driving north along the first road, and an airplane is flying east above the second road. At a particular time the car is kilometers to the north of P and traveling at kmhr while the airplane is flying at speed kmhr kilometers east of P at an altitude of km How fast is the distance between the car and the airplane changing?
