Question

Need help in this question, will flag somebody as brainliest. :)
Please answer with full explanation.

Answer 1

For better understanding ⇒ Refer the attachment.
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In ΔABD

Tan 60° = AB/BD

        √3 = AB/t

       AB = t√3                          ............(1)
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In ΔABC

Tan 30° = AB/BC

     1/√3 = AB/s

       AB = s/√3                       ............(2)
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Multiplying (1) and (2)

AB × AB = t√3 × s/√3

        AB² = st

         AB = √st
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And so the height of tower is √st (i.e) option (b) is correct.
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