The height of mobile telephone tower erected on a plane is `20(sqrt3+1)`m. When the altitudes of the sun is `30^@` and `45^@`,the lengths of the shadows of the tower on the plane are x m and y m respectively, Show that x-y=40m.

The height of a telephone tower erected on a plane is 20(sqrt3+1) m.When the altitudes of the sun is 30^@ and 45^@ ,the lengths of the shadwos of the tower on the plane are x m and y m respectively.Show that x-y=40m.

When the altitude of the sun is 30^@ the length of the shadow of a minaret on the ground is 30m .When the altitude of the sun is 60^@ ,find the length of the shadow of the minaret.

The shadow of a tower standing on a level ground is found to be 40m longer when the sun altitude is 30°, then when it is 60° . Find the height of the tower.

The length of the shadow of a 9 m high verticel post is 3sqrt3 m.Find the altitude of the sun.[The altitude of the sun is the angle of elevation of the vertex of the post from the front of the shadow of the post].

Find the length of a shadow of a vertical post of heigth 6m when the angle of elevation of the sun is 30^@

The length of shadow of a tower on the plane ground is sqrt3 times the height of the tower.The angle of elevation of sun is

The height of a tower is 10m.What is the length of its shadow when sun's elevation is 45^@ ?

Fom a window 60m high above the ground of a house in a street ,angles of elevation and depression of the top and the foot of another house on the opposite side of the street are 60° and 45° respectively. Show that the height of the opposite house is 60(1+sqrt 3)m

The distance between two poles of the same height standing on the same plane is 100m.The angles of elevation of the tops of the two poles from a point lying on the line joining the base-points of the poles are found to be 30^@ and 60^@ respectively.Find the heights of the poles and the position of the point.

P and Q are respectively the base and the vertex of the tower PQ.AB is another tower which is at a certain distance apart from PQ.The height of AB is less than that of PQ and the base of AB is A.The angles of elevation of Q from A and B are respectively 60^@ and 45^@ .If AB=40m,find PQ,QA and QB.