Mathematics, 20.09.2019 04:00 triggercell
It takes 7 high school students, working at identical constant individual rates, 10 hours to paint a certain house. at what time will the house be fully painted if 7 students start painting at 9 am and one student, working at the same rate, is added per hour starting at 1 pm?
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It takes 7 high school students, working at identical constant individual rates, 10 hours to paint a...
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