Working alone, the Bill can paint a room in 12 hours. when Tom helps him, the job
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Working alone, the Bill can paint a room in 12 hours. when Tom helps him, the job takes only 8 hours.
How many hours would it take tom to do the job alone?
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ISBN: 9780840058010
7th Edition
Authors: Roxy Peck, Jay L. Devore
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