12 workers work for 20 hours a day and complete building a garage in 10 days. How many days will the job take if there are 20 workers working 8 hours a day.
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Answer:
Hours worked by 12 workers in 1 day= 20 hours x 12 = 240 hours.
Hours worked by 12 workers in 10 days= 240 x 10 = 2400 hours.
work done in 1 hour = 1/2400
ln second condition,
Number of hours worked by 20 workers in a day= 20 x 8 = 160 hours.
No. of days taken by 20 workers working 8 hours a day= 2400/160=15 days.
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