4(6+5π)
4(6+2π)
4(3+3π)
4(3+5π)
Correct answer is A
The angle subtended by the minor arc = π3radians
The angle subtended by the major arc = 2π−π3=5π3
Perimeter of the major arc = rθ+2r
= 12×5π3+2(12)=20π+24
= 4(5π+6)
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