Three men can paint a barn in 12 hours. How long will it take two men to paint a barn?
Three men can paint a barn in 12 hours. How long will it take two men to paint a barn?
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\(\color{blue}W=N\cdot t\cdot n\\ N=\frac{W}{t\cdot n}=\frac{W}{12h\cdot 3}\)
\(N=\frac{W}{36h}\)
\(W=N\cdot t\cdot n\\ W=\frac{W}{36h}\cdot t\cdot 2\\ t=\frac{W\cdot 36h}{2W}\)
\(t=18h\)
Two men can paint a barn in 18 hours.
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