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Bagheera Thakur
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Asked: 2020-11-05T03:20:17+00:00 In:

Find the lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high.

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NCERT Solutions for Class 9 Maths Chapter 13
Important NCERT Questions
Surface Areas and Volumes
NCERT Books for Session 2022-2023
CBSE Board, UP Board and Other state Boards
EXERCISE 13.2
Page No:217
Questions No:9 Part-1

2020-2021cbsechapter 13class 9mathematicsncertsurface areas and volumes
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    2 Answers

    1. Best Answer

      Radius of cylindrical petrol storage tank r = 4.2/2 = 2.1 m and height h = 4.5 m.
      Curved surface area of cylindrical petrol storage tank = 2πrh
      = 2 × 22/7 × 2.1 × 4.5 = 2 × 22 × 0.3 × 4.5 = 59.4 m²
      Hence, the curved surface area of cylindrical petrol storage tank is 59.4 m².

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    2. Get Hindi Medium and English Medium NCERT Solution for Class 9 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-9/maths/chapter-13/

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