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प्रश्न
Find the area of sector of circle of radius 21 cm and central angle 1200.
उत्तर
Area of a sector of a circle = \[\frac{\theta}{360} \times \pi r^2\]
\[= \frac{120}{360} \times \pi \left( 21 \right)^2 \]
\[ = 462 {cm}^2\]
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