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From the top of a platform 5 m high, the...

From the top of a platform 5 m high, the angle of elevation of a tower was `30^@`. If the tower was 45 m high, how far away from the tower was the platform positioned?

A

`45 sqrt3` m

B

`15 sqrt3` m

C

`40 sqrt3` m

D

40 m

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