Time and work Tricks for Competitive Exams (SSC)

Time and work is an another important chapter from competition point of view. First of all I would like to clear you the base concept of this chapter. This chapter is one of the easiest chapters for students to solve with less calculations. There is basically one concept involved in this chapter i.e. concept of efficiency or concept of one day work.

As it is very clear to all of us that the work is directly related with time. As one can say if a particular person  works for more time then  more work will be done and if it devotes less time then it yields less work i.e., output of a person is directly proportional to the time, provided that the worker maintains his/ her efficiency during the work.

The concept of one day work is similar to unitary method. Some points to be kept as a concept of this chapter are as follows:-

“If a worker A completes a work in D days then the work done by the worker in one day = 1/D work.”.

“The work in any question must be considered as 1 until the quantity of work is not specified in the question.”

“No need to learn too many formulae in this chapter, just clear your concept regarding this chapter which will help you alot to solve the problems related to this chapter quickly.”

“The one and only most flexible formula of Mathematics belongs to this chapter only”.

Most Flexible Formula of Mathematics→ 

(M × D × H) /W  = Constant

                  

                    

                    Where :- M = Number of workers working/ worked

                                    D = Number of days workers worked.

                                    H = Number of hours the workers worked per day.

                                    W = Number of work done by the workers.

The above mentioned formula is known as most flexible formula of Mathematics because you can use this formula to get the formula for our problem as per requirement of the question and other quantities can be omitted easily. Some of these derived formulae are as follows :-

1)      M₁ × D₁ = M₂ × D₂.

2)      M₁ × H₁  = M₂ × H₂.

3)      M₁ × D₁ × H₁  = M₂ × D₂ × H₂.

4)      (M₁ × D₁ × H₁) / W₁  = (M₂ × D₂ × H₂) / W₂. 

                                      Or

             M₁ × D₁ × H₁ × W₂  = M₂ × D₂ × H₂ × W₁. 

The Various Questions related to this chapter which are frequently asked in the examinations will be presented to your for self study on this blog soon, so keep visiting and sending your suggestions and requirements too to us through the forum.