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From the top of a building 90 m high, th...

From the top of a building 90 m high, the angles of depression of the top and the bottom of a tree are `30^(@) and 45^(@)` respectively. What is the height of the tree?

A

`30 sqrt3 m`

B

`90-30 sqrt3 m`

C

`90 + 30 sqrt3 m`

D

`60 + 30 sqrt3 m`

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