13. The radius of a circle is 20cm. Thre...

13. The radius of a circle is 20cm. Three more concentric circles are drawn inside it in such that it is divided into four parts of equal area. The radius of the largest of the three concentric circles is

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RD SHARMA ENGLISH-AREAS RELATED TO CIRCLES-All Questions

If diameter of a circle is increased by 40%, then its area increase...
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In Fig. 15.107, the shaded area is (FIGURE) (a) 50(pi-2)c m^2 (b) ...
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In Fig. 15.108, the area of the segment P A Q is (FIGURE) (a) (a^2)/4(...
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In Fig. 15.109, the area of segment A C B is (FIGURE) (a) (pi/3-(sq...
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If the area of a sector of a circle bounded by an arc of length 5pi ...
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In Fig. 15.110, the ratio of the areas of two sectors S1 and S2 is ...
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If the area of a sector of a circle is 5/(18) of the area of the cir...
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If the area of a sector of a circle is 7/(20) of the area of the ci...
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In Fig. 15.111, if A B C is an equilateral triangle, then shaded ar...
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In Fig. 15.112, the area of the shaded region is (FIGURE) (a) 3pi\ c...
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If the perimeter of a circle is equal to that of a square, then the...
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13. The radius of a circle is 20cm. Three more concentric circles are ...
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The area of a sector whose perimeter is four times its radius r uni...
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If a chord of a circle of radius 28 cm makes an angle of 90o at ...
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If area of a circle inscribed in an equilateral triangle is 48pi sq...
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The hour hand of a clock is 6 m long. The area swept by it between ...
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A B C D is a square of side 4 cm. If E is a point in the interio...
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If the area of a circle is equal to the sum of the areas of two circ...
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If pi is taken as 22//7 , the distance (in metres) covered by a wh...
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ABCD is a rectangle whose three vertices are B(4, 0), C(4, 3) and D(...
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