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Anand Singh
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Asked: 2020-11-05T08:09:20+00:00 In:

The paint in a certain container is sufficient to paint an area equal to 9.375 m². How many bricks of dimensions 22.5 cm × 10 cm × 7.5 cm can be painted out of this container?

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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 13.1
Page No:213
Questions No:4

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

    1. 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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    2. Best Answer

      Lenght of one brick l = 22.5 cm, breadth b = 10 cm and height h = 7.5 cm
      Total surface area of brick = 2(lb + bh + hl) = 2(22.5 × 10 + 10 × 7.5 + 7.5 × 22.5) cm²
      = 2(225 + 75 + 168.75) cm² = 937.5 cm² = 0.09375 m²
      Number of bricks to be painted
      = Total paint available/paint for one brick = 9.375 m²/0.09375 m² = 100
      Hence, the paint of this container can paint 100 bricks.

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