New Enroll in RBI Gr B 2025 Exclusive New Batch on March 18

    Question

    A and B can complete a work together in 36 days. If A

    alone can complete one-fourth of the work in ‘x’ days and remaining work is completed by B alone in 3x days, then find the value of x.
    A 15 days Correct Answer Incorrect Answer
    B 18 days Correct Answer Incorrect Answer
    C 19 days Correct Answer Incorrect Answer
    D 20 days Correct Answer Incorrect Answer
    E 21 days Correct Answer Incorrect Answer

    Solution

    Time taken by A to complete the work = (x × 4) = 4x days Time taken by B to complete the work = (3x × 4/3) = 4x days According to question, => (1/4x) + (1/4x) = 1/36 => (1 + 1)/4x = 1/36 => 4x = 72 => x = 18

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