A 1.5m tall boy is standing at some distance from a 30m tall building. The angle of elevation from his eyes to the top of the building increases from `30^@` to `60^@` as he walks towards the building. Find the distance he walked towards the building.

At a distance of 100 feet, the angle of elevation from the horizontal ground to the top of a building is 42^(@) . The height of the building is

An observer, 1.5m tall, is 28.5 m away from a tower 30m high. Determine the angle of elevation of the top of the tower from his eye.

From the top of a building 15m high the angle of elevation of the top of tower is found to be 30^@ . From the bottom of same building ; the angle of elevation of the top of the tower is found to be 60^@ . Find the height of the tower and the distance between tower and building .

A boy standing on a horizontal plane finds a bird flying at a distance of 100 m from him at an elevation of 30^@ . A girl standing on the roof of 20 metre high building, finds the angle of elevation of the same bird to be 45^@ . Both the boy and the girl are on opposite sides of the bird. Find the distance of bird from the girl.

A boy standing on a horizontal plane finds a bird flying at a distance of 100 m from him at an elevation of 30^@ . A girl standing on the roof of 20 metre high building, finds the angle of elevation of the same bird to be 45^@ . Both the boy and the girl are on opposite sides of the bird. Find the distance of bird from the girl.

A boy standing on a horizontal plane finds a bird flying at a distane of 100 m from him at an elevation of 30^(@) . A girl standing on the roof of a 20 m high building finds the angle of elevation of the same bird to be 45^(@) . Boy and girl are on the opposite sides of the bird. Find the distance of the bird from the girl.

From a point P on the ground the angle of elevation of a 10m tall building is 30^@ . A flag is hoisted at the top of the building and the angle of elevation of the top of the flag-staff from P is 45^@ . Find the length of the flag-staff and the distance of the building from the point P . (Take sqrt(3)=1. 732) .

The angle of elevation of the top of a building from the foot of the tower is 30^o and the angle of elevation of the top of the tower from the foot of the building is 60^o . If the tower is 50 m high, find the height of the building.

The angle of elevation of the top of a tower from the top and bottom of a building of height 'a' are 30^@ and 45^@ respectively. If the tower and the building stand at the same level , the height of the tower is

The angle of elevation of the top of a tower from the top and bottom of a building of height 'a' are 30^@ and 45^@ respectively. If the tower and the building stand at the same level , the height of the tower is