122. Six men working 10 hours a day
can do a piece of work in 24 days.
In how many days will 9 men work-
ing for 8 hours a day do the same
work?
a) 10 days b) 15 days
c) 20 daysd ) 25 days
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Answer:
20 days
1day work =10*6 =60
Total work --> 24*60=1440
9*8=72
1440/72=20
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