Time and Work Shortcuts/Tricks

Time and Work is an important topic asked in banking and other competitive exams like IBPS Clerk, SBI Clerk, SSC CGL, IBPS PO, SBI PO, CAT and more. This article is a part of ‘’Shortcut Techniques’’ series. This shortcut method to solve Time and Work problems quickly will help you to save at least 1 minute per problem. 

Time and Work- Model-2(Days based)


If you are confused on this please read first post then you will get clarification on this

1.A can do a piece of Work in X days and B can do the same work in 3X days. To finish the work together they take 12 days. Then what is the value of X?

Ans)

         A=X     days                    X=?
         B=3X   days
         A+B=12 days

       Take the LCM of A and B(Total units)   
                                                    =3X

  • Let us find the A’s one days’s Work = (3X/X)   =3units/day
  •                          B‘s one days’s Work = (3X/3X)   =1units/day

        Now A+B’s one day’s Work= 3+1
                                                        = 4 units/day


  • Now the value of X=(Total units/(A+B)’s one day’s work)

                                           =3X/4

                                         X=4/3

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