2 simple geometry questions?

Hi!! so the first one, i've done similar questions before, but i'm not sure i remember how to diagram and figure it out correctly. the other one, 25PI is the right answer!! well the ratio is 2:5. if the first one (2) has an area of 10PI, then you know it has to be multiplied by 5PI in order to get that answer. do the same with the 5. multiply by 5PI and you will get 25PI!! hope this helps!