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Choose the Correct Alternative Answer for the Following Question.A Cone Was Melted and Cast into a Cylinder of the Same Radius as that of the Base of the Cone. - Geometry


Choose the correct alternative answer for the following question.

A cone was melted and cast into a cylinder of the same radius as that of the base of the cone. If the height of the cylinder is 5 cm, find the height of the cone.



  • 15 cm

  • 10 cm

  • 18 cm  

  •  5 cm 

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The radius of the cone = Radius of the cylinder = r cm (Say)
Height of the cylinder, h = 5 cm 
Let the height of the cone be H cm.
It is given that the cone melted and recasted into a cylinder.
∴ Volume of the cone = Volume of the cylinder

\[\Rightarrow \frac{1}{3}\pi r^2 H = \pi r^2 h\]
\[ \Rightarrow H = 3h\]
\[ \Rightarrow H = 3 \times 5 = 15 cm\]

Thus, the height of the cone is 15 cm.

  Is there an error in this question or solution?
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Balbharati Mathematics 2 Geometry 10th Standard SSC Maharashtra State Board
Chapter 7 Mensuration
Practice set 7.4 | Q 1.6 | Page 160
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