The tops of two poles of height 20 m and 14 m are connected by a wire. If the wire makes an angle 30° with the horizontal, then the length of the wire is :

The angle of elevation of the sun when the length of the shadow of a pole is ?3 times the height of the pole will be :

A tower subtends an angle of 30° at a point on the same level as the foot of the tower. At a second point, h m above the first, the depression of the foot of the tower is 60°. The horizontal distance of the tower from the point is :

At a point, 15 m away from the base of a 15 m high house, the angle of elevation of the top is :

When the length of the shadow of a pole is equal to the height of the pole, then the elevation of source of light is :

A 20 m high electric pole stands upright on the ground with the help of steel wire to its top and affixed on the ground. If the steel wire makes 60° with the horizontal ground, then find out the length of the steel wire.

The top of a 15 m high tower makes an angle of elevation of 60° with the bottom of an electric pole and an angle of elevation of 30° with the top of the pole. What is the height of the electric pole?

From a 15 m high bridge on the river, the angle of depression of a boat is 30°. If the speed of the boat be 6 Km/h, then the time taken by the boat to reach exactly below the bridge will be :

The angle of elevation of a tower from a distance 50 m from its foot is 30°. The height of the tower is :

If r sin ? = 1, r cos ? = ? 3 then the value of ( ? 3 tan ? + 1 ) is :

Two posts are x meter apart and the height of one is double that of the other. If from the midpoint of the line joining their feet, an observer finds the angular elevations of their tops to be complementary, then the height (in meter) of the shorter post is :