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8th Class Mental Ability Algebraic Expressions Question Bank Algebra

  • question_answer
    A publishing house recruit 6 typists to type the manuscript of a book. If all the typists work for 5 hours a day, they take 16 days to complete the work. Due to some reason two typists leave the work before it starts and hence the company is left with only 4 typists to complete the work. In how many days will 4 typists complete the same job working 6 hour a day?

    A) 20 days    

    B)                    15 days                                    

    C)                    10 days               

    D)        12 days

    E) None of these

    Correct Answer: A

    Solution :

    Explanation Option [a] is correct. 6 typists working 5 hours a day can finish the job in 16 days. 1 typist working 1 hour a day can finish the job in \[16\times 5\times 6\] days. 4 typists working 6 hours a day can finish the job in \[\frac{16\times 5\times 6}{6\times 4}=20\,\,days.\]   


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