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Mathematics, 25.01.2021 03:30 justinbailey96

Sam and his friend are working at the body shop. Sam can do the work in 7hours. When his friend is helping him they do the same work in 4 hours. How long does it take Sam's friend to do this work alone?

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Sam and his friend are working at the body shop. Sam can do the work in 7hours. When his friend is h...
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