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

    Question

    Suppose five friends Ritu, Mohani, Aman, Sam and Kiran are appoints to complete a certain piece of work. Ram and Mohani together can complete a work in 24 days. Mohani and Aman together can complete 50% of the work in 15 days. Aman and Sam together can complete the work in 24 days. Ritu and Kiran together can complete 16.66% of the work in 6 days. Sam and Kiran together can complete the work in 20 days.

    Aman is how much % (less/more) efficient than

    Kiran?
    A 40% more Correct Answer Incorrect Answer
    B 40% Less Correct Answer Incorrect Answer
    C 60% more Correct Answer Incorrect Answer
    D 60% Less Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    ATQ, we can say that Efficiency of, Ram = r, Mohani = m, Aman = a, Sam = s, Kiran = k (r + m) × 24 = (m + a) × 30 = (a + s) × 24 = (r + k) × 36 = (s + e) × 20 = 360 r + m = 15, m + a = 12, a + s = 15, r + k = 10, s + k = 18 (m + a) + (a + d) – (r + m) – (s + k) + (r + k) = 12 + 15 – 15 – 18 + 10 2a = 4 a = 2, m = 10, r = 5, s = 13, k = 5. Hence required % will be =  (5 – 2)/5 × 100 =  60% Less

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