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The slant height of a frustum of a cone ...

The slant height of a frustum of a cone is 4cm and the perimeters (circumference ) of its circular ends are 18cm and 6cm . Find the curved surface area of the frustum.

Text Solution

Verified by Experts

The correct Answer is:
`=4 pi xx(12)/(pi)=48 cm^(2)`.
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