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Mathematics, 22.08.2019 06:20 josh11742

One bricklayer can build a wall in 6 hours. another bricklayer could build the same wall in 4 hours. if they work together, how long will it take to build the wall?

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One bricklayer can build a wall in 6 hours. another bricklayer could build the same wall in 4 hours....
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