Find the radius of a circle whose area is `616 cm^(2)`.

Find the perimeter of the circle whose area is 6.16 cm^2 .

Find the radius of a sphere whose surface area is 616 cm^(2) .

Find the radius of a circle whose circumference is 176 cm.

Find the area of a circle whose radius is 2.1 m.

The radius of the circle is 14 m. Find the radius of another circle whose area is one. fourth of the area of pervious circle.

Find the area of circle whose radius is 25 m

The parallel sides of a trapezium are 48 cm, 40 cm, and the distance between them is 14 cm. Find the radius of a circle whose area is equal to the area of the trapezium.

Find the area of circle whose diameter is 21 cm