Multiple Choice Questions on A and B can do a piece of work in 10 days B and C in 15 days and C and A in 20 days C alone can do t........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A and B can do a piece of work in 10 days B and C in 15 days and C and A in 20 days C alone can do t...........

Quantitative Aptitude ( CCS) Time and work
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    A and B can do a piece of work in 10 days, B and C in 15 days and C and A in 20 days. C alone can do the work in

    60 days

    Incorrect Answer

    120 days

    Correct Answer

    80 days

    Incorrect Answer

    30 days

    Incorrect Answer
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    Explanation:

    A+B+C work 13/2 units/day

    A+B work 6 unit/day

    C work/day = (A+B+C) - (A+B)

    13/2 − 6/1 = 1/2 unit/day

    C will finish in 60/1/2 = 120 days

    Hence, option 2 is the correct answer.

    By: Amit Kumar
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