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The diameters of three circles are in t...

The diameters of three circles are in the ratio `3 : 5 : 6`. If the sum of the circumferences of these circles be 308 cm, find the difference between the areas of the largest and the smallest of these circles.

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The correct Answer is:
1039.5 `cm^(2)`
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ICSE-AREA AND PERIMETER OF PLANE FIGURES-EXERCISE 20(C)
  1. The diameter of two circles are 32 cm and 24 cm. Find the radius of th...

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  2. The radius of a circle is 5 m. Find the circumference of the circle wh...

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  3. The circle of largest area is cut from a rectangular piece of card-boa...

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  4. The following figure shows a square card-board ABCD of side 28 cm. Fou...

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  5. The radii of two cirlces are in the ratio 3 : 8. If the difference be...

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  6. The diameters of three circles are in the ratio 3 : 5 : 6. If the sum...

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  7. Find the area of a ring shaped region enclosed between two concentric ...

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  8. The circumference of a given circular park is 55 m. It is surrounded b...

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  9. There are two circular gardens A and B. The circumference of garden ...

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  10. A wheel had diameter 84 cm. Find how many complete revolutions must it...

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  11. The wheels of a car are of diameter 80 cm each. How many complete r...

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  12. An express train is running between two stations with a uniform speed....

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  13. The minute hand of a clock is 8 cm long. Find the area swept by the m...

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  14. The shaded portion of the figure, given alongside, shows two concentri...

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  15. In the figure, the area of the shaded portion is 770 cm^(2). If the ci...

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  16. The cost of fencing a circular field at the rate of Rs 240 per metre i...

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  17. Two circles touch each other externally. The sum of their areas is 58...

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  18. The given figure shows a rectangle ABCD inscribed in a circle as shown...

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  19. A square is inscribed in a circle of radius 7 cm. Find the area of the...

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  20. A metal wire, when bent in the form of an equilateral triangle of larg...

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