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If the slant height of the frustum of a cone is 10 cm and the perimeters of its circular base are 18cm and 28cm respectively.

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asked Feb 8, 2018 in Mathematics by Kundan kumar (49,132 points) ● 34 ● 379 ● 1010

If the slant height of the frustum of a cone is 10 cm and the perimeters of its circular base are 18cm and 28cm respectively. What is the curved surface area of the frustum?

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answered Feb 8, 2018 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 21
edited Feb 8, 2018 by Vikash Kumar
 
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Let r and ,R be the radii of the two circular ends of the frustum of the cone

Now, curved surface area of the frustum

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