One grocery clerk can stock a shelf in 25 min. A second clerk requires 30 min to stock the same shelf. How long would it take to stock the shelf if the two clerks worked together?
Added by Linda C.
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The first clerk can stock the shelf in 25 minutes, so their rate is: \[ \text{Rate of first clerk} = \frac{1 \text{ shelf}}{25 \text{ minutes}} = \frac{1}{25} \text{ shelves per minute} \] Show more…
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