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If diameter of a circle is increased by 40%, then its area increases by (a) 96%           (b) 40%          (c) 80%          (d) 48%

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Decrease : 70 by 40%

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RD SHARMA ENGLISH-AREAS RELATED TO CIRCLES-All Questions
  1. If A B is a chord of length 5sqrt(3) cm of a circle with centre ...

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  2. The area of a circle whose area and circumference are numerically e...

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  3. If diameter of a circle is increased by 40%, then its area increase...

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  4. In Fig. 15.107, the shaded area is (FIGURE) (a) 50(pi-2)c m^2 (b) ...

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  5. In Fig. 15.108, the area of the segment P A Q is (FIGURE) (a) (a^2)/4(...

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

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

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  8. In Fig. 15.110, the ratio of the areas of two sectors S1 and S2 is ...

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

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

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

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

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

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

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

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

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

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

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

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

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