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Rohan Duaby
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Asked: 2020-10-29T05:47:48+00:00 In:

A drinking glass is in the shape of a frustum of a cone of height 14 cm. The diameters of its two circular ends are 4 cm and 2 cm. Find the capacity of the glass.

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NCERT Solutions for Class 10 Maths Chapter 13
Important NCERT Questions
Surface areas and Volumes,
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 13.4
Page No:257
Questions No:1

2020-2021cbsechapter 13class10mathematicsncertsurface areas and volumes
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    2. Best Answer
      A drinking glass is in the shape of a frustum of a cone of height 14 cm. The diameters of its two circular ends are 4 cm and 2 cm. Find the capacity of the glass.

      Radius of upper part of glass (r₁) = 4/2 = 2 cm
      Radius of lower part of glass (r₂) = 2/2 = 1 cm
      Height = 14 cm
      Capacity of glass = Volume of frustum
      = 1/3πh(r₁²+ r₂² + r₁r₂) = 1/3πh(2² + 1² + 2 × 1) = 1/3 × 22/7 × 14 × (7)
      = 1/3 × 22 × 14 = 308/3 = 102(2/3)cm³.
      Hence, the capacity of glass is 102(2/3)cm³.

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    3. Get Hindi Medium and English Medium NCERT Solution for Class 10 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-10/maths/chapter-13/

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