Area - Arithmetic Aptitude Questions and Answers

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If the side of a square is equal to the diameter of a circle, what is the area of the square if the area of the circle is 81π sq. cm?

350 sq. cm.

384 sq. cm.

324 sq. cm.

456 sq. cm.

Answer : Option C

Explanation :

Area of the circle = 81π sq. cm.

π × radius² = 81π

Radius = 9 cm

Diameter of circle = 9 *2= 18 cm

Now, Diameter of circle = Side of the square = 18 cm

So, Area of the square = Side² = 18² = 324 sq. cm.

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