The area enclosed between the concentric circles is `770\ c m^2` . If the radius of the outer circle is 21 cm, find the radius of the inner circle.

The area enclosed between the concentric circles is 770cm^(2). If the radius of the outer circle is 21cm, find the radius of the inner circle.

The area enclosed between two concentric circles is 770 sq. cm given that the radius of the outer circle is 21 cm. Find the radius of the inner circle.

The area enclosed between two concentric circles is 770 cm^(2) . If the radii of the circles differ by 7 cm, find both the radii.

The area of the region between two concetric circles is 770cm^2 If the radius of the greater circle is 21 cm.Find the radius of the smaller circle.

The area enclosed between two concentric circles is 770 cm^(2) .If the radii of the circles differ by 7 cm ,find both the radii.

The area of the region between two concetric circles is 346.5cm^2 .If the circumference of the inner circle is 88 cm.,find the radius of the outer circle.

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

The area of a circle is 154cm^(2). Find the radius of the circle.

The area of a circle is 616 c m^2dot Find the radius of the circle.