For the circle, the exact area is 36pi square cm which is approximately 113.04 square cm (assuming you use pi = 3.14). To get this answer, you use the formula
A = pi*r^2
and you'll plug in r = 6
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For the rectangular partially hollow figure, you will do two things:
Step 1) Find the area of the largest rectangle: 7*10 = 70
Step 2) Find the area of the inner rectangle: 2*4 = 8
Now subtract those two results: 70-8 = 62
So the final answer is 62 square cm