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 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.

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 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.

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.

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.

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 point on the top of a palace of 60 metres height, it is observed that the angle of depression of the tip and the foot of a tower are 30^@ and 60^@ respectively. Find the height of the tower.

From te top of a tower , 60 meters high, the angles of depression of the top and bottom of a pole are alpha and beta respectively .Find the height of the pole.

A passenger of an aeroplane observes that Howrah station is at one side of the plane and Saheed minar is just one the opposite side. The angles of depression of Howrah station and Saheed minar from the passenger of aeroplane are 60^@ and 30^@ respectively. If the aeroplane is at a height of 545sqrt3 metres at that time, then find the distance between Howrah Stateion and Sahed minar.

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.