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    Question

    A is twice as good a workman as B and together they

    finish a piece of work in 14 days. The number of days taken by A alone to finish the work is 
    A 11 days Correct Answer Incorrect Answer
    B 21 days Correct Answer Incorrect Answer
    C 28 days Correct Answer Incorrect Answer
    D 42 days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let daily work done of A =2units & Daily work done of B =1units So (A+B)’s 1 day work = 2+1 = 3units;                      Total work done by A & B in 14 days = 14×3 =42 units     So A alone can complete job in  = 42/2 = 21 days

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