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2 years ago

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To solve work problems, find the portion of the job each person completes in 1 unit of time. The sum of these portions is the po

Gwar [14]

Answer:

4.8 minutes

Step-by-step explanation:

Using the given hint, working together, the amount of floor mopped in 1 minute is ...

1/8 + 1/12 = 3/24 +2/24 = 5/24 . . . . jobs/minute

The reciprocal of that is the rate in terms of minutes per job. Thus the entire job takes 24/5 = 4.8 minutes.

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3 years ago