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?

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More questions: Mathematics Another questions

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?

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Another question on Mathematics

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?