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    Question

    Anand is capable of finishing a task in 36 days when

    working solo. Akash, being 40% more efficient than Anand, can accomplish tasks quicker. Calculate how many days it would take for Anand and Akash to complete the work if they collaborate.
    A 15 days Correct Answer Incorrect Answer
    B 18 days Correct Answer Incorrect Answer
    C 12 days Correct Answer Incorrect Answer
    D 21 days Correct Answer Incorrect Answer
    E 10 days Correct Answer Incorrect Answer

    Solution

    Let the efficiency of Anand = '5x' units/day Then, total work = 5x X 36 = '180x' units Efficiency of Akash = 5x X 1.4 = '7x' units/day Combined efficiency of Anand and Akash = 5x + 7x = '12x' units/day So, time taken to complete the entire work = 180x ÷ 12x = 15 days Hence, option a.

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