Mathematics, 28.07.2020 09:01, austinkellylay

) Richie and his brother have a paper route. Together they can deliver all of the papers in 40 minutes, and Richie can do it alone in 90 minutes. Richie’s brother slept in one day, leaving Richie to deliver alone for 30 minutes. How long must the two of them work together to finish delivering the newspapers?

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) Richie and his brother have a paper route. Together they can deliver all of the papers in 40 minut...