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    Question

    2 men and 3 boys can do a piece of work in 405 days

    while 3 men and 2 boys can do the same work in 324 days. In how many days can 5 men and 5 boys do that work?
    A 175 Correct Answer Incorrect Answer
    B 180 Correct Answer Incorrect Answer
    C 176 Correct Answer Incorrect Answer
    D 177 Correct Answer Incorrect Answer

    Solution

    According to the question, (2M+3B) x405 = (3M + 2B) ├Ч324 ┬а 810M+1215B=972M+648B 972M-810M=1215B-648B 162M = 567B M = 567B /162=7B / 2 Let 5 men and 2 boys complete the work in (x) days. (5M+5B) x = (3M + 2B) ├Ч324 (5x7B/2+5B) x = (3x7B/2+2B) x324 (35B+10B) ├Чx/2=(25B├Ч324)/2 (45B├Чx)/2 =25B├Ч324)/2 X=(324├Ч25B)/45B X=180days.

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