The slant height of the frustum of a cone is 6 cm and the perimeter of its circular ends are 20 cm and 8 cm. Its curved surface area is

48 cm²

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90 cm²

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84 cm²

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54 cm²

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Solution

The correct option is C
84 cm²

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The slant height of the frustum of a cone is 6 cm and the perimeter of its circular ends are 20 cm and 8 cm. Its curved surface area is

The correct option is C 84 cm2

The correct option is C
84 cm²