The height of a cone is 60cm. A small cone is cut off at the top of by a plane parallel to its base. If its volume is 1/64 of volume of the cone, at what height above the base is the section made? A. 23cm B. 15cm C. 20cm D. 17cm Answer Workspace Report Discuss Answer with explanation Answer: Option B Explanation (⅓ * π * r1^2 * h1 )/ (⅓ π * r^2 * h) / 1/64 (r1/r)^2 * h1/h = 1/64 (h1/h) ^3 = (¼)^3 ( r1/r = h1/h) h1 = ¼ * 60=15 Workspace
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