20 men and 30 boys can do a certain job in 20 days how long will it take 6 men and 15 boys to do the same job?
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20*30=20
6*15=?
20*30*20/6*15
12000/90
1200/9
400/3
133.33
6*15=?
20*30*20/6*15
12000/90
1200/9
400/3
133.33
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