Question

Figure I shows two concentric circles. The radius of the larger circle is
15 cm and the radius of the smaller circle is 12 cm. Find
the area of the larger circle.
the area of the smaller circle.
the shaded area between the circles. [Take t = 3.14)
​

Answer 1

Radius of larger circle = r = 15cm
Area of larger circle = πr^2
= 3.14 x 15 x 15
= 706.5 cm^2

Radius of smaller circle = 12cm
Area of larger circle = πr^2
= 3.14 x 12 x 12
= 452.16 cm^2

Shaded area between the circles = Area of larger circle - Area of smaller circle
= 706.5 - 452.16
= 254.34 cm^2

Answer 2

The answer of this question is 706.5