39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons working 6 hours a day, complete the work
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39 people can do work in 12 days for 5 hrs
1person can do work in( 39×12 ×5) days for an hour
30 people can do work in {(39×12×5)÷30} days
30 people can do work in 13 days for 6 hrs
1person can do work in( 39×12 ×5) days for an hour
30 people can do work in {(39×12×5)÷30} days
30 people can do work in 13 days for 6 hrs
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57
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