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Area of the four walls of a room 2h(l + b): cost, paint cans or height

This type of question, asked 4 times: 24 Jul 2023 S2, 25 Jul 2023 S2, 27 Jul 2023 S2, 23 Sep 2024 S2. All 4 questions below, oldest first.

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  1. Question 1

    24 Jul 2023 S2

    74
    The length, breadth, and height of a room are 10 m, 8 m and 6 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of ₹7.50 per m2\text{m}^2.

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  2. Question 2

    25 Jul 2023 S2

    64
    The length, breadth and height of a hall are 10 m, 20 m and 15m respectively. Find the cost of whitewashing the walls of the inside of the hall and ceiling at the rate of ₹10.20/m2\text{m}^2

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  3. Question 3

    27 Jul 2023 S2

    74
    The length of a hall is 21 m and the width is 14 m. The sum of the areas of the floor and the flat roof is equal to the sum of the areas of the four walls. Find the height of the hall.

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  4. Question 4

    23 Sep 2024 S2

    58
    The length, breadth and height of a room is 15 m, 9 m, and 5 m, respectively. From each can of paint 40 square metre of area is painted. How many cans of paint will be needed to paint only the walls of the room?

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