Question

An observer notices that an aeroplane flies directly overhead. Two minutes later the aeroplane is at an angle of elevation of 25 degrees. If the speed of the aeroplane is 350 m/s, find the altitude of the aeroplane.

Answer 1

d is distance traveled
d = v*t
d = 350*120

using trig we can solve for h
tan(65) = d/h
--> h = d/tan(65)

hope that helps :)