Multiple Choice Questions on A B C and D can do a piece of work in 20 days If A and B can do it together in 50 days and C alone i........... for IBPS RRB - Office Assistant/ Clerical Exam Preparation

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Multiple Choice Questions

A B C and D can do a piece of work in 20 days If A and B can do it together in 50 days and C alone i...........

Quantitative Aptitude(IBPS RRB CL) Time and work
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    A, B, C, and D can do a piece of work in 20 days. If A and B can do it together in 50 days, and C alone in 60 days, find the time in which D alone can do it.

    66

    Incorrect Answer

    72

    Incorrect Answer

    55

    Incorrect Answer

    75

    Correct Answer
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    Explanation:

    D alone will take 1/20 – 1/50 – 1/60 = 4/300 = 1/75
    ⇒ 75 days to complete the work.

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