Lisa, an experience shipping clerk, can fill a certain order in 7 hours. Tom, a new clerk, needs 10 hours to do the same job. Wo
rking together, how long will it take them to fill the order ? The solution is __ hours .
1 answer:
Answer:
<em><u>8</u></em><em><u>.</u></em><em><u>5</u></em><em><u> </u></em><em><u>hours</u></em>
Step-by-step explanation:
Total time = average time

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-- = --
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Step-by-step explanation:
