exam Maths Puzzle Numerical Ability

The area of a circle circumscribing about an equilateral triangle is 254.47 square meter.What is the area of the triangle in square meter?

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(Nine more than the product 4 and the number is 73). I am helping my niece and I am stumped, Help..... 5 - 2
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x-3 x
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1 + 2
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X x-3