Area of square plate = \( \Large (Side)^{2} \) = \( \Large (2d)^{2}=4d^{2} \) Area of circular plate = \( \Large \pi \left(\frac{d}{2}\right)^{2}=\frac{\pi d^{2}}{4} \) Number of square plates =\( \Large \frac{4d^{2}}{\frac{\pi d^{2}}{4}}=\frac{4\times 4}{\pi} \)=5 Since, nearest integer value is 5.