Question

A highway patrol plane is flying 1 mile above a long, straight road, with constant
ground speed of 120 m.p.h. Using radar, the pilot detects a car whose distance
from the plane is 1.5 miles and decreasing at a rate of 136 m.p.h. How fast is the
car traveling along the highway? (Hint: You may give an exact answer, or use the
fact that√5 ≈ 2.2.)
I want to check my work , and rough diagram would be nice
Taken from mit ocw single variable calculus final exam number 6.

Answer 1

it is math: single variable calculus, only related rates are needed

Answer 2

http://openstudy.com/study#/updates/4d9f76f28f378b0b1947e417