A hemisphere and cone stand on equal bases with equal heights . Find ratio of their curved surfaces
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given,
cone,hemisphere and cylinder have same base and equal height.
curved surface area of cone=πrl
curved surface area of cylinder=2πrh
curved surface area of hemisphere=2πr²
ratio=CSA of cone: CSA of hemisphere:CSA of cylinder
=πrl:2πrh:2πr²
=l:2h:2r
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