If 20 labourers complete a piece of work in 8 days and after 4 days, 8 labourers leave the job, how much work has already been completed?
- 1/2
- 1/3
- 1/4
- None of these
Explanation
Total work = Number of labourers x Total days
Total work = 20 x 8 = 160 units
Work done in first 4 days = 20 labourers x 4 days
Work done = 80 units
Fraction of work completed = Work done / Total work
= 80 / 160
= 1 / 2
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