If the angle of elevation of the top of a tower of a distance 400 m from its foot has measure 30, then the height of the tower is ……..

The tops of two poles of height 18 m and 12 m are connected by a wire. If the wire makes an angle of measure 30 with horizontal, then the length of the wire is

The angle of elevation of the top of the building A from the base of building B has measure 50. The angle of elevation of the top of the building B from the base of building A has measure 70. Then, ………….

The angle of depression of a ship from the top of a tower 30 m height has measure 60. Then, the distance of the ship from the base of the tower is ………..

When the length of the shadow of the pole is equal to the height of the pole, then the angle of elevation of the source of light has measure