Mathematics, 19.01.2021 06:10 pwolfiimp4
5) Dan and Joan were able to clean the attic in 7 hours together, It takes
Joan 9 hours to complete the same job alone. Without help, how long
would it take Dan to complete the same job?
Answers: 2
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5) Dan and Joan were able to clean the attic in 7 hours together, It takes
Joan 9 hours to complete...
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