Question

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

Answer 1

Answer:

3 cm

Step-by-step explanation:

So the area of the total circle is:

$\pi \times 5^{2} = \pi \times 25$

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 =

$\sqrt{9} = 3$

So the radius of the inner circle is 3.