CBSE Class 10-Mathematics: Chapter –9 Some Applications of Trigonometry Part 12
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Question 21:
From the top of a building 60 m high, the angles of depression of the top and bottom of a vertical lamp post are observed to be and respectively. Find:
(i) The horizontal distance between the building and the lamp post
(ii) The height of the lamp post.
Height of Lamppost is H Meter
Answer:
Suppose height of lamppost is h meter.
In
In right
By eq. (i) and (ii)
Question 22:
A man standing on the deck of a ship which is above the water level observes the angle of elevation of the top of a hill as and the angle of depression of the base of the hill as . Calculate the distance of the hill from the ship and the height of the hill.
A Man Standing on the Deck of a Ship
Answer:
Let Height of hill
In right
In right
Equating the values of , we get
And distance of hill from ship