Question

2nd question in the picture.

Answer 1

We are unable to see the picture

Answer 2

Step-by-step explanation:

Area of outer circle =πr^2=22/7)*42=22*6=132cm^2

Now

radius of inner circle =42-7=35cm

Area of inner circle =22/7)*35=110 cm^2

So

Area of black part =(area of outer circle - area of inner circle)

=(132 - 110)

=22 cm^2

I think it is helpful for you