Question 131
A circular area is carved out of the square sheet of side 10 cm as shown in the figure. What is the area of the sheet that remains after the circle has been carved out?
Solution
The area of square = 10*10 = 100$$cm^2$$
Now the side of the square is equal to the diameter of the square.
Hence the diameter of the circle is 10cm
So the radius of the circle will be 5 cm.
Hence the area of the circle = $$\pi*r^2$$ = $$\pi*5^2$$ = 78.5$$cm^2$$
Thus, the remaining area = 100 - 78.5 = 21.5 $$cm^2$$
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