Multiple Choice Questions on Walls excluding their roofs and floors of 5 identical rooms having length breadth and height 6 m 4 m........... for CDS Exam Preparation

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Multiple Choice Questions

Walls excluding their roofs and floors of 5 identical rooms having length breadth and height 6 m 4 m...........

Quantitative Aptitude (CDS) Mensuration 2D
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    Walls (excluding their roofs and floors) of 5 identical rooms having length, breadth and height 6 m, 4 m and 2.5 m respectively are to be painted. Paints are

    available only in cans of 1 L and one litre of paint can be used for painting 20 square metres. What is the number of cans required for painting?

     

    10

    Incorrect Answer

    12

    Incorrect Answer

    13

    Correct Answer

    14

    Incorrect Answer
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    Explanation:

    Area of one room to be painted = 2(bh + hl) = 2((4*2.5) + (2.5*6)) = 50 m2

    Area of 5 rooms = 50*5 = 250m2

    For painting 20m2 = 1 can is used So, for painting 250m2, number of cans used: = 250/20 = 12.5 , i.e., approximately 13 cans

    By: Munesh Kumari
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