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 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 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 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 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 of a circular ring enclosed between two concentric circles is 286 cm? Find the radii of the two circles, given that their difference is 7 cm.

The area covered by two concentric circles is 770 cm^2 . The outer radius is 21 cm. Find the inner radius of circle.

Find the area enclosed between two concentric circles of radii 3.5 cm and 7 cm. A third concentric circle is drawn outside the 7 cm circle, such that the area enclosed between it and the 7 cm circle is same as that between the two inner circles. Find the radius of the third circle correct to one decimal place.

Find the area enclosed between two concentric circles of radii 3.5 cm and 7 cm. A third concentric circle is drawn outside the 7 cm circle, such that the area enclosed between it and the 7 cm circle is same as that between the two inner circles. Find the radius of the third circle correct to one decimal place.

The area enclosed between the circumferences of two concentric circles is 16picm^(2) and their radii are in the ratio 5 : 3. What is the area of the outer circle ?

Find the area of the space enclosed by two concentric circles of radii 25 cm and 17 cm.