Question

PLEASE HELP SOLVE. i believe the answer is 50cm^2. can someone help.

Answer 1

3 cm

Explanation:

So the area of the total circle is:

`\pi * 5^(2) = \pi * 25`

If you remove the outer band you have the area of the inner circle

`25\pi - 16\pi = 9\pi`

This means that the inner circle had an area of

area = pi * r^2

9 pi = pi * r^2

r =

`√(9) = 3`

So the radius of the inner circle is 3.