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    Question

    20 men can complete a piece of work in 40 days. β€˜x’

    men started the work and after 35 days 64 more men joined them so that whole work was finished in the desired time. Find the value of β€˜x’
    A 10 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 12 Correct Answer Incorrect Answer
    D 18 Correct Answer Incorrect Answer

    Solution

    Total work = 20 Γ— 40 = 800 units According to question; 35 Γ— x + 5 Γ— (x + 64) = 800 Or, 35x + 5x + 320 = 800 Or, 40x = 480 Or, x = 12

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