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    Question

    ‘A’ can do a piece of work in 15 days.

    ‘B’ can do 70% of the same work in 20 days. If they work together for the entire time and get paid Rs.1220, then find the share of ‘A’.
    A Rs.880 Correct Answer Incorrect Answer
    B Rs.800 Correct Answer Incorrect Answer
    C Rs.900 Correct Answer Incorrect Answer
    D Rs.760 Correct Answer Incorrect Answer

    Solution

    Let the total work be 60 units. (LCM of 15 and 20) Efficiency of A = 60/15 = 4 units/day Efficiency of B = (60/20) × (70/100) = 21/10 units/day Ratio of the efficiency of A : B = 4 : 21/10 = 40:21 Share of A = (40/61) × 1220 = Rs.800

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