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40 men can complete a piece of work in 40 days. They started the work together. But at the end of each 10th day, 5 men left the job. The work would have been completed in
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Explanation:
Let a man can do 1 unit/ day.
Total work = 40men×40days
= 1600 units
40 men can do the work in 10 days
= 400 units
According to question,
(5men left after 10 days)
35 men can do the work in 10 days
=350 units
30 men can do tlhe work in 10 days
=300
25 men can do the work in 10 days
=250
20 men can do the work in 10 days
=200
men left 20−5=15 and
work left = 1600−1500=100 units
they will complete in 100\15=6 2\3days
Total days =50+6 2\3=56 2\3 days