Maharashtra State Board course SSC (English Medium) Class 10th Board Exam
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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

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ConceptProblems Based on Areas and Perimeter Or Circumference of Circle, Sector and Segment of a Circle

Question

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 

Solution

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?

APPEARS IN

 Balbharati Solution for Balbharati Class 10 Mathematics 2 Geometry (2018 to Current)
Chapter 7: Mensuration
Practice set 7.4 | Q: 1.6 | Page no. 160
Solution 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. Concept: Problems Based on Areas and Perimeter Or Circumference of Circle, Sector and Segment of a Circle.
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