Multiple Choice Questions on x 2 person can do a work in x days and x 7 person can do 75 of the same work in x 10 days Then in h........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

x 2 person can do a work in x days and x 7 person can do 75 of the same work in x 10 days Then in h...........

Quantitative Aptitude ( CCS) Time and work
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    (x-2) person can do a work in x days and (x+7) person can do 75% of the same work in (x-10)days. Then in how many days can (x+10) person finish the work?

    27 days

    Incorrect Answer

    12 days

    Correct Answer

    25 days

    Incorrect Answer

    18 days

    Incorrect Answer
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    Explanation:

    Explanation :
    3/4 * (x-2)x = (x+7)(x-10)
    x – 6x – 280 = 0
    x = 20; x = -14
    (x-2)x = 18 * 20 = 360
    360 = 30 * y
    y = 12 days

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