The angle of elevation of a jet fighter plane from a point on the ground is 60°. After a flight of 15 seconds, the angle becomes 30°. If the jet is flying at a height of 3000√3 m, find its speed.
Q1. The angle of elevation of a jet fighter plane from a point on the ground is 60°. After a flight of 15 seconds, the angle becomes 30°. If the jet is flying at a height of 3000√3 m, find its speed.
Answer: 800 m/s
Explanation: Using tan 60° and tan 30°, we calculate the distance traveled and hence the speed.