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# Short Answer Type Questions- Some Applications of Trigonometry Class 10 Notes | EduRev

## Class 10 : Short Answer Type Questions- Some Applications of Trigonometry Class 10 Notes | EduRev

The document Short Answer Type Questions- Some Applications of Trigonometry Class 10 Notes | EduRev is a part of the Class 10 Course Mathematics (Maths) Class 10.
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Q1. A tower stands vertically on the ground. From a point on the ground which is 20 m away from the foot of the tower, the angle of elevation of the top of the tower is found to be 60Â°. Find the height of the tower.

Sol. In the figure, AB is the tower,

âˆ´ AB = h metres
In rt Î” ABC, we have:

â‡’      |âˆµ tan 60Â° = âˆš3 and AB = 20 m

â‡’ h = 20âˆš3 metre
Thus, the height of the tower = 20âˆš3 m.

Q2. The angle of depression of the top and the bottom of a 9 m high building from the top of a tower are 30Â° and 60Â° respectively. Find the height of the tower and the distance between the building and the tower.

Sol. Let AB represents the building and CD be the tower.

âˆ´ AB = 9 m

In right Î” BDC, we have:

â‡’

In right Î” AEC, we have:

Thus, height of the tower = 13.5 m
Distance between the building and the tower = 7.8 m

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## Mathematics (Maths) Class 10

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