1.

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.

Answer» 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`


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