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The slant height of a frustum of a cone is 4 cm and the perimeters (circumferences) of its circular ends are18 cm and 6 cmthen the curved surface area of

the frustum is _______. 1


2pie×R =18
2 pie×r=6
pie×r= 3
circumference of frustum
=48 cm (square)
0 0 0
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