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Please tell me the answer of 11th question

Please tell me the answer of 11th question S. Ifthe diameter ofa semicircular protractor is 14 cm, then find its perimeter. 9. The diameter ofa cycle wheel is 21 cm. How many revolutions will it make to travel 1.98km? 10. The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 5 minutes. 11. Find the area of the shaded region in the figure if AC=24 cm 10 cm and O is the center of the circle. c 12. ABC is a quadrant of circle of radius 14 cm and a semi-circle is drawn with BC as diameter. Find the area of shaded region. . URFACE A CONCEPTS: AREA OF A CU AND VOL MES

Shaded area = area of semicircle -area of triangle //r^2/2 -1/2 × 24×10 //=pi 22/7 ×13×13/2-- 120 1859/7-120 265.5-120=145.5cm^2

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Firstly find the area of full circle then find the ar of semi circle and triangle after that for getting the area of shaded region minus the ar of tri and semi circle from the ar of full circle Then u will get ur required ans and area of shaded region
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