A man is moving away from a tower 41.6 m high at the rate of 2 m/sec. Find the rate at which the angle of elevation of the top of tower is changing, when he is at a distance of 30m from the foot of the tower. Assume that the eye level of the man is 1.6m from the ground.

The height of the mobile tower is 40sqrt3 metre. The angle of elevation of the top of the tower from a point a distance 120 metre from the foot of the tower is

Height of a tower is 100sqrt(3) metres. The angle to elevation of the top the tower from a point at a distance of 100 metres of foot of the tower is

The angle of elevation of the top of a tower from a point O on the ground, which is 450 m away from the foot of the tower, is 40^(@) . Find the height of the tower.

From the top of a tower , which is 240m high , if the angle of depression of a point on the ground is 30^@ . then the distance of the point from the foot of the tower is

From the top of a cliff 25 m high the angle of elevation of a tower is found to be equal to the angle of depression of the foot of the lower. The height of the tower is____

A 5 ft long man walks away from the foot of a 12 1/2 ft high lamp post at the rate of 3 mile/h. Find the rate at which his shadow is increasing.

The angles of elevation of the top of a tower from two points at a distance of 4 m and 9 m, find the height of the tower from the base of the tower and in the same straight line with it are complementary.

From the top of a building, the angle of elevation of the top of a cell tower is 60^(@) and the angle of depression to its foot is 45^(@) . If distance of the building from the tower is 7m, then find the height ofthe tower.

From the two points on the same straight line with the foot of a tower the angles of elevation of the top of the tower are complementary. If the distance of the two points from the foot of the tower are 9 metre and 16 metre and the two points lie on the same side of the tower, then find the hegiht of the tower.

A.Multiple choice questions (MCQ) : (i) If the angle of elevation of the top of a mobile tower from a distance of 10 metres from its foot is 60^(@) , then height of the tower is