RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 20. Surface Area and Volume of a Right Circular Cone

Subject: Mathematics - Class 9th

Q. No. 16 of CCE - Formative Assessment

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If a cone is cut into two parts by a horizontal plane passing through the mid-point of its axis, the ratio of the volumes of upper and lower part is

We have, (by mid point theorem)

Radius of complete cone = 2r

Radius of small cone after cutting = r

Hight of complete cone = 2h

Hight of small cone = h

So ratio of volume of lower and upper parts =

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