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  1. 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?

  2. A.
    20 days
    B.
    18 days
    C.
    16 days
    D.
    15 days

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    Answer : Option D

    Explanation :

    Given, 5 skilled workers can build a wall in 20 days i.e., 1 skilled worker can the wall build in 100 days

    The capacity of each skilled worker is

    8 semi-skilled workers can build a wall in 25 days i.e., 1 semi-skilled worker can build a wall in 200 days

    The capacity of each semi-skilled worker is

    Similarly, The capacity of 1 unskilled worker is

    Now, The capacity of 2 skilled + 6 semi-skilled + 5 unskilled workers is

    The required numbers of days is 15.


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