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Laasya
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Asked: 2021-03-12T05:10:23+00:00 In:

Daniel is paining the walls and ceiling of a cuboidal hall with length, breadth and height of 15 m, 10 m and 7 m respectively. From each can of paint 100 m² of area is painted. How many cans of paint will she need to paint the room?

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NCERT Solutions for Class 8 Mathematics Chapter 11
Important NCERT Questions
Mensuration Chapter 8 Exercise 11.3
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 5

2020-2021cbsechapter 11class8mathematicsmensurationncert
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    1. Best Answer

      Here,
      Length of wall (l) = 15 m, Breadth of wall (b) = 10 m and Height of wall (h) = 7 m
      ∴ Total Surface area of classroom = lb + 2(bh+hl)
      = 15 x 10 + 2 (10 x 7 + 7 x 15)
      = 150 + 2 (70 + 105) = 150 + 350 = 500 m²
      Now Required number of cans = Area of hall/Area of one can =500/100=5cms
      Hence, 5 cans are required to paint the room.

      Class 8 Maths Chapter 11 Exercise 11.3 Solution in Video

      for more answers vist to:
      https://www.tiwariacademy.com/ncert-solutions/class-8/maths/chapter-11/

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