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  • Question

  • What is the cost of painting the two adjacent walls of a hall which has no windows or doors?
    I. The area of the hall is 24 m 2.
    II. The breadth, length and the height of the hall are in the ratio of 4 : 6 : 5.
    III. Area of one wall is 30 m 2.


  • Options
  • A. Only I
  • B. Only II
  • C. Only III
  • D. Either I or III

  • Correct Answer
  •  

    Explanation

    As per given all statements , we can see that
    I. The area of the hall = 24 m2
    II. The ratio of breadth, length and the height of the hall = 4 : 6 : 5
    From II, Let L = 4x , B = 6x and H = 5x
    Then, area of the hall = L × B = 4x × 6x
    = 24x2 m2
    ? Area of the hall = 24 m2
    ? 24x2 = 24 ? x = 1 m
    L = 4 x 1 = 4 m, B = 6 x 1 = 6 m and H = 5 x 1 = 5 m.
    III. Area of one wall = 30 m2
    Thus, area of two adjacent walls = [( L x H ) + ( B x H )] m2 can be found out and so the cost of painting two adjacent walls may not be found out.
    Cost of painting is not given, hence data inadequate.

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    • Options
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    • 3. 
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