Time and Work is one of the important topics of competitive exams. Questions are often being asked in this topic in the competitive exams. We are providing you Important Short Tricks on Time & Work Questions which are usually asked in Competitive Exams. The only thing we have to do is, we have to apply the appropriate tricks and solve the problems in a limited time. This limited time would be one minute or less in most of this type of exams.In most of the problems on time and work, either of the following basic parameters are to be calculated:
1. Work from Days:
If A can do a piece of work in n days, then A’s n days work is=1/n
No. of days = total work / work done in 1 day
Days from Work: If A’s 1 day’s work =1/n then A can finish the work in n days.
2. Relationship between Men and Work.
More men ——- can do ——- More work
Less men ——- can do ——- Less work
3. Relationship between Work and Time
More work ——– takes—— More Time
Less work ——– takes—— Less Time
4. Relationship between Men and Time
More men ——- can do in ——-> Less Time
Less men ——- can do in ——-> More Time
5. If M1 persons can do W1 work in D1 days and M2 persons can do W2 work in D2 days, then
M1D1/W1 = M2D2/W2
6. If M1 persons can do W1 work in D1 days for h1 hours and M2 persons can do W2 work in D2 days for h2 hours, then
M1D1H1/W1 = M2D2H2/W2
7. If A can do a work in ‘x’ days and B can do the same work in ‘y’ days, then the number of days required to complete the work if A and B work together is
X*Y/X+Y
8. If A can do a work in ‘x’ days and A + B can do the same work in ‘y’ days, then the number of days required to complete the work if B works alone is
X*Y/X-Y
9. 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.