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Indian Institute of Foreign Trade 2012 Solved Paper
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© examsnet.com
Question : 32
Total: 128
There are two buildings, one on each bank of a river, opposite to each other. From the top of one building - 60 m high, the angles of depression of the top and the foot of the other building are 30° and 60° respectively. What is the height of the other building
30 m
18 m
40 m
20 m
Validate
Solution:
The given situation is as shown:-
Width of the river
=
tan
‌
30
×
60
=
20
Now
tan
‌
30
=
(
60
−
x
)
(
20
√
3
)
Solving we get
x
=
40
m
Thus, the height of the building = 40m
Hence, option C is the correct answer.
© examsnet.com
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