Area enclosed by two concentric circles

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

The shaded portion in the adjoining figure shows a circular path enclosed by two concentric circles. If the inner circumference of the path is 176 m and the uniform width of the circular path is 3.5 m, find the area of the path.

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

For two concentric circles.

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

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 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.