Three concentric circles: radii 35 cm, 21 cm, and 7 cm. The shaded part is the middle ring.<br><br>&bull; Unshaded part = outer ring (r = 35 to r = 21) + inner circle (r = 7).<br>&bull; Outer ring area = \( \pi (35^2 - 21^2) = \dfrac{22}{7} \times (1225 - 441) = \dfrac{22}{7} \times 784 = 2464 \) cm&sup2;.<br>&bull; Inner circle area = \( \pi \times 7^2 = \dfrac{22}{7} \times 49 = 154 \) cm&sup2;.<br>&bull; Total unshaded area = 2464 + 154 = 2618 cm&sup2;.<br><br>Final Answer: 2618 cm&sup2;