A bird is sitting on the top of a 80 m high tree. From a point on the ground, the angle of elevation of the bird is `45^(@)`. The bird flies away horizontallly in such away that it remained at a constant height from the ground. After 2 seconds, the angle

A bird is sitting on the top of a vertical pole 20 m high and its elevation from a point O on the ground is 45o . It flies off horizontally straight away from the point O. After one second, the elevation of the bird from O is reduced to 30o . Then the speed (in m/s) of the bird is (1) 40(sqrt(2)-1) (2) 40(sqrt(3)-2) (3) 20""sqrt(2) (4) 20(sqrt(3)-1)

From a point on the ground, the top of a tree is seen to have an angle of elevation 60^(@) . The distance between the tree and a point is 50 m. Calculate the height of the tree?

A statue stands on the top of a 2m tall pedestal. From a point on the ground, the angle ofelevation of the top of the statue is 60^(@) and from the same point, the angle of elevation of the top of the pedestal is 45^(@) . Find the height of the statue.

A statue 1.6 m tall stands on the top of a pedestal. From a point on the ground, the angle of elevation of the top of the statue is 60^(@) and from the same point angle of elevation of the top of the pedestal is 40^(@) . Find the height of the pedestal. (tan40^(@)=0.8931, sqrt(3)=1.732)

the angle of elevation of the top of a tower at a point on the ground 50m away from the foot of the tower is 45^(@) . Then the height of the tower ( in meters ) is ………. .

The angle of elevation of the top of a hill at a point on the ground 130 m away from the foot of the tower is 45^(@) . Then the height of the tower ( in meter ) is .........