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    Question

    Tina is 50% more efficient than Rina, and Mina is 30%

    more efficient than Tina. If Mina and Tina together can do a piece of work in 12 days, in how many days will Rina complete the same work alone?
    A 47.6 days Correct Answer Incorrect Answer
    B 29.6 days Correct Answer Incorrect Answer
    C 45.6 days Correct Answer Incorrect Answer
    D 41.4 days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let efficiency of Rina be ‘x’ units per day. Ratio of efficiency of Rina, Tina, and Mina = x: 1.5x: 1.95x = 100:150:195 Let total amount of work = (150 + 195) × 12 = 4140 units Time taken by Rina to complete the work = 4140/100 = 41.4 days

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