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

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

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

The areas of two concentric circles forming a ring are 154 sq.cm and 616sq.cm. The breadth of the ring is (a) 7cm21cmquad (d)28cm

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

The difference between the areas of two concentric circles is 88" cm"^(2) If the radius of the inner circle is 6 cm. then the area ("in cm"^(2)) of the larger circle is closest to: ("Take "pi=(22)/(7))

If the radii of two concentric circles are 5 cm and 13 cm then the length of the chord of one circle which is tangent to the other circle is …..