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From the top of a cliff 90 m high, the a...

From the top of a cliff 90 m high, the angles of depression of the top and bottom of a tower are observed to be `30^(@)` and `60^(@)` respectively. The height of the tower is :

A

60 m

B

75 m

C

30 m

D

45 m

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The correct Answer is:
A
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