6. man. can. do. this. work. in. 30. days. in. how. many. days. 20. man can do
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Step-by-step explanation:
If 20 men can complete the job in 30 days, then the work measured in terms of mandays is 20×30=600. If this work is to be done by 25 men, then the number of days they will take is 600/25=24.
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