defence exam Indian Coast Guard Assistant Commandant (GD/CPL) 2025 Test Series Mathematics Trigonometry Heights and Distances
A plane flying 5 km vertically above the ground. A man standing on the ground observes the plane and the angle of inclination changes from 30º to 60º in 30 sec. Neglecting the height of the man, calculate the speed of the plane.
1
211.45 m/s
2
192.45 m/s
3
211.45 km/h
4
192.45 km/h