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    Question

    Ruchi, Khushi and Tej can do a piece of work in 30, 40

    and 60 days respectively. In how many days can Ruchi do the work, if she is assisted by both Khushi and Tej on every third day?
    A 85/4days Correct Answer Incorrect Answer
    B 35/4days Correct Answer Incorrect Answer
    C 25/3days Correct Answer Incorrect Answer
    D 18/4days Correct Answer Incorrect Answer

    Solution

    RuchiKhushiTej 304060 120LCM of 30,40,60 432 Working type -Ruchi +Ruchi+ (Ruchi +Khushi +Tej) Working in first 3 days =4+4+4+3+2=17units  3×7days =17×7=119units 21days =119units Remaining work =120-119=1unit  22days =1/4 days  Total days = 21+1/4=85/4days

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