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`triangle ABC` is an equilateral triangle and `AD bot BC`, where D lies in BC. If `AD= 4 sqrt3` cm, then what is the perimeter (in cm) of `triangle ABC`?
त्रिभुज ABC एक समबाह त्रिभुज है तथा `AD bot BC है, जहाँ D, BC पर स्थित है | यदि `AD= 4 sqrt3` सेमी है, तो त्रिभुज ABC का परिमाप ( सेमी में) कितना होगा ?

A

27

B

24

C

30

D

21

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