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If the area of a sector of a circle boun...

If the area of a sector of a circle bounded by an arc of length `5pi` cm is equal to `20pi\ c m^2` , then the radius of the circle is
(a) 12 cm
(b) 16 cm
(c) 8 cm
(d) 10 cm

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RD SHARMA ENGLISH-AREAS RELATED TO CIRCLES-All Questions
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  3. In Fig. 15.108, the area of the segment P A Q is (FIGURE) (a) (a^2)/4(...

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  4. In Fig. 15.109, the area of segment A C B is (FIGURE) (a) (pi/3-(sq...

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  5. If the area of a sector of a circle bounded by an arc of length 5pi ...

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  7. If the area of a sector of a circle is 5/(18) of the area of the cir...

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  8. If the area of a sector of a circle is 7/(20) of the area of the ci...

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  9. In Fig. 15.111, if A B C is an equilateral triangle, then shaded ar...

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  10. In Fig. 15.112, the area of the shaded region is (FIGURE) (a) 3pi\ c...

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  11. If the perimeter of a circle is equal to that of a square, then the...

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  12. 13. The radius of a circle is 20cm. Three more concentric circles are ...

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  13. The area of a sector whose perimeter is four times its radius r uni...

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  14. If a chord of a circle of radius 28 cm makes an angle of 90o at ...

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  15. If area of a circle inscribed in an equilateral triangle is 48pi sq...

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  16. The hour hand of a clock is 6 m long. The area swept by it between ...

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  17. A B C D is a square of side 4 cm. If E is a point in the interio...

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  18. If the area of a circle is equal to the sum of the areas of two circ...

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  19. If pi is taken as 22//7 , the distance (in metres) covered by a wh...

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  20. ABCD is a rectangle whose three vertices are B(4, 0),  C(4, 3) and D(...

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