To solve this problem, we can use the concept of work rates.
Maria's work rate is 1/8 of the job per hour, while Felipe's work rate is 1/9 of the job per hour.
When they work together, their work rates add up. So, the combined work rate is 1/8 + 1/9 = (9 + 8)/(8 * 9) = 17/72 of the job per hour.
Therefore, working together, they can fill the entire order in 72/17 hours, which is approximately 4.24 hours.
Maria, an experienced shipping clerk, can fill a certain order in 8 hours.Felipe, a new clerk, needs 9 hours to do the same job. Working together, how long will it take them to fill the order?
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