math 10-3

Question

Answer 1

(3)

Step 1:

The diameter of the inside circle is .

The diameter of the outside circle is .

The area of the circle is .

The area of the inside circle is .

Substitute .

.

The area of the outside circle is .

Substitute .

.

Step 2:

The area of the brim is .

Substitute and .

.

The area of the brim is .

Solution:

The area of the brim is .