422.92cm
149.92cm
44.00cm
43.96cm
Correct answer is C
r = 16, R = 23; 2\(\pi R - 2 \pi r\)
= 2\(\pi(R - r)\)
= 2 x \(\frac{22}{7} (23 - 16)\)
= 2 x \(\frac{22}{7} \times (7)\)
= 44cm
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