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Time and Work - ( Arithmetic Aptitude)

  1. Work from Days:
    If A can do a piece of work inndays, then A's 1 day's work = 1 .
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  2. Days from Work:
    If A's 1 day's work = 1 , then A can finish the work inndays.
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  3. Ratio: If A is thrice as good a workman as B, then: Ratio of work done by A and B = 3 : 1. Ratio of times taken by A and B to finish a work = 1 : 3.