The adjoining figure shows two circles with the same centre. The radius of the larger circle is 10 cm and the radius of the smaller circle is 4 cm.Find:
(a) the area of the larger circle
(b) the area of the smaller circle
(c) the shaded area between two circles ( π=3.14)

Explanation

Here, radius of larger circle, `R = 10` cm
Radius of smaller circle, `r = 4` cm

(a) `:.` Area of larger circle, `A =piR^2 = 3.14**10**10 = 314 cm^2`

(b)Area of smaller circle `a = pir^2 = 3.14**4**4 = 50.24cm^2 `

(c) Area of shaded region ` = A-a = 314-50.24 = 263.76cm^2`