If 20 man can do a piece of work in15 days working 10 hours a day , how many hours a day must 25 men can do that work in 12 days
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20 men * 8 hours daily = 160 hours workload per day
160 hours * 18 days = 2880 hours total needed to complete the work. (this is what is needed to complete the same work)
Now, let total days be “x” therefore,
20 men * 10 = 200 hours workload per day
200 * x days = 2880 (because we know it takes 2880 hours to complete this work)
200x = 2880
x = 2880/200
x = 14.4,
Therefore, the 20 men will take 14.4 days by working 10 hours to complete the work.
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