From the top of a cliff \( 3 C 0 \) metres high, the top of a tower was observed at an angle of ...

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From the top of a cliff \( 3 C 0 \) metres high, the top of a tower was observed at an angle of depression \( 30^{\circ} \) and from the foot of the tower the top of the cliff was observed at an angle of elevation \( 45^{\circ} \), The height of the tower is
(A) \( 50(3-\sqrt{3}) \mathrm{m} \)
(B) \( 200(3-\sqrt{3}) m \)
(C) \( 100(3-\sqrt{3}) \mathrm{m} \)
(D) none of these
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