O is the centre of the circle and ∠AOB = 150°, and

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O is the centre of the circle and ∠AOB = 150°, and the shaded portion is x part of the circular region, then x = ?

1. 1/12
2. 1/9
3. 1/6
4. 1/4

Correct Option: C

∠AOC = ∠BOD = 180° – 150° = 30°

∴ Area of region x =	60	× πr²
	360

=	1	× πr² sq. cm.
	6