Answer:
Area of the remaining sheet = Area of the circular card sheet ? 2 × Area of small circle ? Area of the rectangle \[=\frac{22}{7}\times 14\times 14-2\times \frac{22}{7}\times {{(3.5)}^{2}}-3\times 1\] = 616? 77 ? 3 \[=536\text{ }c{{m}^{2}}\]
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