30 persons can do a piece of work in 24 days.How many more people are required to complete the work in 20 days?
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30 persons can do a work in 24 days
a person can do that work in 24x30 days
total 720 days work
let p persons complete in 20 days
so. 20 p =. 720
p =720/20 =36
36 persons can do in 20 days
so 6 more persons are required
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