EllaLovesAnime
18.08.2019 •
Mathematics
Patrice, by himself, can paint four rooms in 10 hours. if he hires april to , they can do the same job together in 6 hours. if he lets april work alone, how long will it take her to paint the four rooms?
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Ответ:
so we can call the 4 rooms "1 job" for simplicity.
-- Patrice, by himself, does the job in 10 hours. So he does 1/10 of
the job each hour.
-- Working together, Patrice and April do the job in 6 hours. So when
they work together, they do 1/6 of the job each hour.
-- April's part of the job is (1/6 - 1/10) = (5/30 - 3/30) = 2/30 = 1/15 job per hour.
-- Her unit rate alone is 1/15 job per hour, or 15 hours per job.
Ответ:
4x + 3/2y
Step-by-step explanation:
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