You are Here : Home » Aptitude » Ratio & Proportion A cone hemisphere and a cylinder stand on the same base and have equal height find the ratio of their curved surface area A. l: h: r B. l:2h:r C. l:2h:2r D. 2l:2h:2r Answer Workspace Report Discuss Answer with explanation Answer: Option C Explanation 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 Workspace
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