From an aeroplane vertically above a straight road the angles of depression of two consecutive mile stones on the road are observed to be `45^@` and `30^@`. Find the height of the aeroplane above the road.

A passenger in an aeroplane flying over a straight road observed two consecutive milestones, 1km apart on the straight road at 60^@ and 30^@ angle of depression respectively. Find the height of the plane from the road at that time.

From the top and bottom of a cliff the angles of depression and elevation of the top of a pillar 60ft high are observed to be 30^@ and 60^@ respectively. Find the height of the cliff.

If the angle of depression of two consecutive kilometer stones on a road from an aeroplane are 60^@ and 30^@ respectively. Find the height of the areroplance when the two kilometre stones stand on the same side of aeroplane.

From a light house the angles of depression of two ships on opposite sides of the light house are observed to be 30^@ and 45^@ . If the height of the light house is h metres, the distance between the ships is____

If the angle, fo depression of two conseutive mile stones on a road from an aeroplane are 60^(@) and 30^(@) respectively. Find the height of the aeroplane, (i) when the two mile stone stand on opposite side of the aeroplane, (ii) when the two stones stand on the same side of the aeroplane.

From the top of a cliff, 150 metres high, the angles of depression of the top and bottom of a pillar are found to be 30^@ and 60^@ respectively, find the height of the pillar.

If the angle of depression of two consecutive km stones on a road from an aeroplane are 60^@ and 30^@ respectively, then find the height of the aeroplane when the two km stones on the same side of the aeroplane.

If the angle of depression of two consecute kilometer stones on a road from an aeroplane are 60^@ and 30^@ respectively, then find the height of the aeroplane when two km stones stand on the same side of the aeroplane.

The angle of elevation of a stationary cloud from a point 2500 feet above a lake is 30^@ and the angle of depression of its reflection in the lake is 45^@ .Find the height of cloud above the lake water surface .

From a point on the roof a house 11 metres height, it is observed that the angles of depression of the tip and foot of a lamp post are 30^@ and 60^@ respectively. Find the height of the lamp post.