The angle of elevation of an aeroplane from a point on the ground is `45^@` . After a flight of 15 seconds, the elevation changes to `30^@` . If the aeroplane is flying at a height of 3000 metres, find the speed of the aeroplane.

The angle of elevation of an aeroplane from a point P on the ground is 60^@ . After a flight of 15 seconds, the angle of elevation changes to 30^@ . If the aeroplane is flying at a constant height of 1500 sqrt3 m, find the speed of the aeroplane

The angle of elevation of an airplane from a point on the ground is 60^(@) . After a flight of 30 seconds, the angle of elevation becomes 30^(@) . If the airplane is flying at a constant height of 3000sqrt(3) m, find the speed of the airplane.

The angle of elevation of a jet plane from a point A on the ground is 60o . After a flight of 30 seconds, the angle of elevation changes to 30o . If the jet plane is flying at a constant height of 3600sqrt(3)m , find the speed of the jet plane.

The angle of elevation of a jet plane from a point A on the grund is 60^0 . After and flight of 30 seconds, the angle of elevation changes to 30^0dot If the jet plane is flying at a constant height of 3600sqrt(3)m , find the speed of the jet plane.

The angle of elevation of a jet plane from a point A on the grund is 60^0 . After and flight of 30 seconds, the angle of elevation changes to 30^0dot If the jet plane is flying at a constant height of 3600sqrt(3)m , find the speed of the jet plane.

The angle of elevation of the top of a building from the foot of the tower is 60^(@) . After a flight of 15 seconds, the angle of elevation changes to 30^(@) . If the aeroplane is flying at a constant height of 1500sqrt3 m find the speed of the plane in km/hr.

The angle of elevation of an aeroplane from a point P on the ground is 60^(@) . After 12 seconds from the same point P, the angle of elevation of the same plane changes to 30^(@) . If the plane is flying horizontally at a speed of 600sqrt3 km/h, find the height at which the plane is flying.

The angle of elevation of an object on a hill from a point on the ground is 30^@ . After walking 120 metres the elevation of the object is 60^@ . The height of the hill is

The angle of elevation of the top of a tower from a point on the ground is 30^(@) . After walking 45 m towards the tower, the angle of elevation becomes 45^(@) . Find the height of the tower.

The angle of elevation of the top of a tower from a point on the ground is 30^(@) . After walking 40sqrt3 m towards the tower, the angle of elevation becomes 60^(@) . Find the height of the tower.