Area of a quadrant = \(\frac{1}{4}\pi r^2\).<br><br>From the figure, the radius \(r = 28\) cm. With \(\pi = \frac{22}{7}\):<br>\(\frac{1}{4} \times \frac{22}{7} \times 28^2 = \frac{1}{4} \times \frac{22}{7} \times 784 = 616\) cm&sup2;.<br><br>Final Answer: 616 cm&sup2;