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Time-work-distance - Facts and Formula

Time and Distance

  • Speed = Distance/Time
  • Time= Distance/Speed
  • Distance = (Speed * Time)
  • If the ratio of the speeds of A and B is a:b , then the ratio of the times taken by them to cover the same distance is 1: 1
    a b or b:a.
  • Suppose a man covers a certain distance at x km/ hr and an equal distance at y km / hr .
    Then , the average speed during the whole journey is 2xy /(x+y) km/ hr.

    Time and Work

  • If A can do a piece of work in n days, then A's 1 day's work = (1/n).
  • If A's 1 day's work = (1/n),then A can finish the work in n days.
  • 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.