there are two lamp posts L1 and L2 of equal height on either side of the road having width 100 m. I f angle of elevation of the lamp-posts from a point on the road are 30 degree and 45 degree , then the height of the lamp-post will be

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Q. The angle of elevation of the top of a lamp-post as observed from a point

40 m

distant from the foot of the post, is

30^{0} .

The height of the lamp post is

Two lamp posts are of equal height. A boy standing mid-way between then observes the elevation of the top of either post to be $30^{\circ}$ . After walking $15 m$ towards one of them, he observes the elevation of it stop to be $60^{\circ}$ . Find the heights of the posts and the distance between them.

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A B, 60 m

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C D

are observed to be

30^{\circ}

and

60^{\circ}

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A B

and

C D

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(iii) The difference between the height of the building and the lamp post.

Q. A lamp post is situated at the middle point

M

of the side

A C

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A B C

with

B C = 7 m, C A = 8 c m

and

A B = 9 m

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A lamp post is situated at the middle point m of the side ac of a triangular plot ABC with BC=7CM, CA=8M and AB=9M. Lamp posts subtend an $∠ 15^{\circ}$ at the point B.determine the height of the lamp post.

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