The radii of two concentric circles are 19 cm and 16 cm respectively. The area of the ring enclosed by these circles is

The radii of two concentric circles are 5 cm and 3 cm respectively . Find the length of the chord of the greater circle which is also a tangent to the smaller circle.

The areas of two concentric circles are 962.5cm^2 and 1386 cm^2 respectively. What is the width of the ring?

The areas of two concentric circles are 1386cm^(2) and 962.5cm^(2) .The width of the ring is

The radii of two concentric circles are 4 cm and 5 cm. The difference in the areas of these two circles is :

The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumference of the two circles.

The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles.

The radii of two circles are 19 cm and 9 cm respectively. Find the radius and area of the circle which has its circumference equal to the sum of the circumferences of the two circles.

The radii of two circle are 19 cm and 9 cm respectively.Find the radius of the circle having area equal to the sum of the area of the two circles.