If the area of a circle is `49pi` square cm then the diamter is ...... cm.

If the area of a circle is 9pi sq. cm then its circumference is

If the area of a circle inscribed in a square is 9pi cm^(2) then the area of the square is

If the area of a circle inscribed in a square is 9 pi cm^(2) , then the area of the square is

The area of a circle is 324 pi square cm. The length of its longest chord (in cm.) is

Find the area of a circle inscribed in a square of side 28cm.

If the area of a circle is 220 cm^2 , then area of a square inscribed in this circle is

The radius of a circle is 7/(sqrt(pi)) cm,then the area of the circle is .

The area of the circle inscribed in a square of side a cm is………………..

The area of a circle varies with the square of its radius. The area of a circle having radius 3 cm is C cm^(2) . Find the area of the circle having redius 9 cm.