The area of a ring is `40 pi cm².` If the width of the ring is 4cm, then the sum of the radii of circles.

The area of sector is 40 pi cm^(2) and the length of the correspondig arc is 10 pi cm, then the diameter of the circle is

The area of a ring is 528cm^(2) and the radius of the outer circle is 17 cm . Find : (i) the radius of the smaller circle . (ii) the width of the ring.

Area of ring is________ cm^2

Two circles touch externally.The sum of their areas is 130 pi sq.cm. and the distance between their centres is 14cm. Find the radii of the circles.

The radii of two circles are 15 cm and 8 cm.If the area of a third circle is equal to the sum of the areas of the two circles, then what will be the radius of the third circle?

The outer radius of a ring is (x+2y)cm and the width is (x+y)cm. What is the area of the ring?

Two circules touch internally. The sum of their areas is 116 pi cm^(2) and the distance between their centres is 6 cm. find the radii of the circles.

Two circules touch internally. The sum of their areas is 116 pi cm^(2) and the distance between their centres is 6 cm. find the radii of the circles.