Quantitative Aptitude > Time and Work

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If a person A can do a piece of work in 'a' days, then working at the same uniform speed A will do fraction of the work in one day.

For example,

 

Days taken to complete 'a' work	25	12.5	1/2
Fraction of work done in a day	1/25 th	1/12.5 th	2

Working together – If working alone can do some work in 'a' days and if another person B working alone can do it in 'b' days , then if A and B

start working together the amount of work done by A & B in one day =

 

Therefore total work is done by A and B working together in days

 

 

 

If A completes a work in 'a' days working alone and B completes it in 'b' days working alone, then intended of assuming the work as 1 unit we can assume total work to be LCM of (a,b) this will avoid the fraction in the calculation.

 

 

If A is thrice as efficient as B then if A takes 12 days to complete a work then B will take = 36 days to complete the work . Whenever

relative efficiency of team member is given the most suitable approach is to consider the capacities of each team member in terms of any given

team member.

Amount of Work done is directly proportional number of person employed to do the work and days worked.

If amount of work is constant then number of days taken to complete the work is inversely proportional to days taken.

Men , Women and children working in a given project.