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    Question

    'Pooja' can complete a work in 28 days. She started the

    work and left after 14 days from starting. The remaining work was done by 'Ritika' in 21 days. Find the time taken by 'Ritika' to complete 50% of the work.
    A 25 days Correct Answer Incorrect Answer
    B 17 days Correct Answer Incorrect Answer
    C 21 days Correct Answer Incorrect Answer
    D 63 days Correct Answer Incorrect Answer

    Solution

    ATQ,
    Fraction of work completed by 'Pooja' = (14/28) = (1/2)
    Remaining work = 1 - (1/2) = (1/2)
    Time taken by 'Ritika' to complete (1/2)th of the work = 21 days
    Time taken by 'Ritika' to complete the whole work = 21 × (2/1) = 42 days
    Therefore, time taken by 'Ritika' to complete 50% of the work = 0.5 × 42 = 21 days

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