Multiple Choice Questions on G is twice as fact as S in doing work If G can do a work in 30 days less than S how many days will t........... for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

G is twice as fact as S in doing work If G can do a work in 30 days less than S how many days will t...........

Quantitative Aptitude (RRB NTPC) Time and work
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    G is twice as fact as S in doing work. If G can do a work in 30 days less than S, how many days will they take to complete the work together?

    25 

    Incorrect Answer

    20

    Correct Answer

    22

    Incorrect Answer

    15

    Incorrect Answer
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    Explanation:

    Ratio of efficiency of G and S =2:1
    Given, 2R-R =30days
    G can do the whole work in 30 days
    S can do the whole work in 60 days
    One day work of Both =1/30 + 1/60 = 3/60
    Both can do whole work in =60/3=20 ???????

    By: Barka Mirza
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