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Olympiad-Math
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Class 9
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Surface Areas and Volumes
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Q)
The slant height of a frustum of a cone is 4 cm and the perimeter of its circular ends are18cm and 6cm. Find the curved surface area of the frustum
( A ) 48 cm^2
( B ) 54 cm^2
( C ) 21 cm^2
( D ) 60 cm^2
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