Question

The angle of elevation of a jet plane from a point a on the ground is 60°.After a flight of 15 seconds the angle of elevation changes to 30°. If the jet plane is flying at a constant height of 1500√3m find the speed of the jet plane

Answer 1

the angle of elevation of a jet plane from a point on the ground airplane second angle of elevation changes to check if the Japanese writing in 15000 parts of the jet plane

Answer 2

$\textbf{Answer is in Attachment !}$