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The diagonal of a square is equal to the...

The diagonal of a square is equal to the side of an equilateral triangle. If the area of the square is `18 sqrt 3` sq.cm. What is the area (in `cm^2`) of the equilateral triangle?
किसी वर्ग का विकर्ण एक समबाहु त्रिभुज की भुजा के बराबर है | यदि वर्ग का क्षेत्रफल `18 sqrt 3` वर्ग सेमी है, तो समबाहु त्रिभुज का क्षेत्रफल ( वर्ग सेमी में ) ज्ञात करें |

A

`54 sqrt2`

B

`27 sqrt2`

C

54

D

27

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