the upper portion of a right circular cone of height H cut off by a plane parallel to the base - Maths - Surface Areas and Volumes

Question

the upper portion of a right circular cone of height H cut off by a
plane parallel to the base is removed if the Curved surface area of
the remainder is three by fourth of the curved surface area of the
whole cone find how high is the cutting plane from the base of the
cone

Ahmad · Answer

answer
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the upper portion of a right circular cone of height H cut off by a plane parallel to the base is removed if the Curved surface area of the remainder is three by fourth of the curved surface area of the whole cone find how high is the cutting plane from the base of the cone