CBSE Class 7 Answered
In the figure given below, a circle is inscribed inside another circle. The radius of the outer circle is 12 cm and that of the inner circle is 7 cm. Find the area of the shaded portion between the circles.
Asked by Topperlearning User | 25 Nov, 2013, 01:27: AM
Expert Answer
Given, radius of the outer circle = 12 cm
So, area of the outer circle =
r2
= 3.14 x 122
= 452.16 cm2
Radius of the inner circle = 7 cm
Area of the inner circle =r2
=
x 72 = 154 cm2
Thus, the required area of the shaded portion
= Area of the outer circle - Area of the inner circle
= 452.16 - 154
= 298.16 cm2
So, area of the outer circle =
r2= 3.14 x 122
= 452.16 cm2
Radius of the inner circle = 7 cm
Area of the inner circle =
r2=
x 72 = 154 cm2Thus, the required area of the shaded portion
= Area of the outer circle - Area of the inner circle
= 452.16 - 154
= 298.16 cm2
Answered by | 25 Nov, 2013, 03:27: AM
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