What is the area of a circle whose radius is 6m?

The area of a circle is given by the formula area = πr2, where π (pi) is approximately 22/7 or 3.14159265358979, or whatever accuracy you want to work to, and r is the radius.

The area of a circle whose radius is 6m is therefore approximately 22/7 x 6 x 6 = 113.143 m2