Each sector's angle = 360°/16 = 22.5°. Area of each sector = $\dfrac{22.5}{360} \times \dfrac{22}{7} \times 7 \times 7 = \dfrac{1}{16} \times 154 = \dfrac{77}{8}$ cm². Answer: (D)
Since 16 identical sectors make a full circle, each sector is simply 1/16 of the total circle area. Total area = πr² = (22/7) × 49 = 154 cm². Dividing by 16 gives 77/8 cm². Watch out for option A (77/4, which would be for 8 sectors) — a common trap.