Question

2. The larger circle of an annulus has a diameter of 10 cm, and the smaller circle has a diameter of 7.6 cm. What is the area of the annulus?

Answer 1

Area = 3.77 cm^2

Explanation:

The diagram using the given statement is attached below

Diameter of larger circle is 10 so radius R1 = 10/2= 5

diameter of smaller circle is 7.6, radius (r1)= 3.8

We need to find the area of the shaded region

Area of the circle =
`\pi r^2`

Area of annulus =
`\pi R1-\pi r1`

=
`\pi (5)-\pi (3.8)`

Area = 3.77 cm^2