Time and Work Shortcuts, Formulas, Video

Time and Work Questions - Page 2
Time and Work Video Lectures - Page 3

Shortcut and Formula on Time and Work

  • Work from Days:
    If A can do a piece of work in n days, then A's 1 day's work = \frac{1}{n}
  • Days from Work:
    If A's 1 day's work = \frac{1}{n} , then A can finish the work in n days.
  • 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.
  • If A is 'x' times as good a workman as B, then he will take of the time by B to do the same work.
  • A and B can do a piece of work in 'a' days and 'b' days respectively, then working together, they will take \frac{xy}{x+y} days to finish the work and in one day, they will finish \frac{xy}{x+y}th part of work.

 

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