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    Question

    Aman and Bhuvan can complete a work in 21 days together,

    while Bhuvan alone can do it in 35 days. If the ratio of efficiencies of Aman and Chintu is 2:3, find the ratio of efficiencies of Bhuvan and Chintu.
    A 1:9 Correct Answer Incorrect Answer
    B 1:1 Correct Answer Incorrect Answer
    C 1:4 Correct Answer Incorrect Answer
    D 1:2 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let total work = 105 units {LCM of 21 and 35}

    Efficiency of (Aman + Bhuvan) = 105/21 = 5 units/day

    Efficiency of Bhuvan = 105/35 = 3 units/day

    Therefore, efficiency of Aman = 5 – 3 = 2 units/day

    Efficiency of Chintu = 2 × (3/2) = 3 units/day

    Required ratio = 3 : 3 = 1 : 1

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