48 cm
40 cm
43 cm
45 cm
Correct answer is C
Perimeter of the sector = \(2r + \frac{\theta}{360°} \times 2\pi r\)
= \(2(10.5) + \frac{120}{360} \times 2 \times \frac{22}{7} \times 10.5\)
= \(21 + 22\)
= 43 cm
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