1. It takes Doug 6 days to reroof a house. If Doug's son helps him, the job...
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1. It takes Doug 6 days to reroof a house. If Doug\'s son helps him, the job can be completed in 4 days. How long would it take Doug\\\'s son, working alone, to do the job?
Related Book For
Niebels Methods, Standards and Work Design
ISBN: 978-0073376318
13th edition
Authors: Andris Freivalds, Benjamin Niebel
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