New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A man, a woman and a boy can do a work in 3, 2, 6 days

    respectively. How many children were required with 1 man and 1 woman to complete the same work in 1/2 day?
    A 6 Correct Answer Incorrect Answer
    B 3 Correct Answer Incorrect Answer
    C 8 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer
    E 7 Correct Answer Incorrect Answer

    Solution

    Work done by a man in 1/2days = 1/6part Work done by a woman in 1/2days = 1/4part Work done by a boy in 1/2days = 1/12part Let one man and one woman together can do a piece of work in 1/2days = No. of x children required According to the question, 1/6 + 1/4+ 1/12= 1 (2 + 3 + x )/12 = 1 5 + x = 12 x = 12 – 5 = 7 Hence, 7 boys will be required.

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