mosesbrinker
09.01.2020 •
Mathematics
23. it takes two painters 9 hours to scrape a house how long would it take three painters to
scrape the same house?
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Ответ:
3 painters will scrape the same house in 6 hours.
Step-by-step explanation:
If all the painters work at a constant rate, then the number of painters employed to scrape the house is inversely proportional to the number of hours required to scrape the house.
Therefore, the product of the number of painters, N employed and the number of hours, H required to scrape the house will be constant.
So,
⇒
⇒
hours.
Therefore, 3 painters will scrape the same house in 6 hours. (Answer)
Ответ:
7.14
Step-by-step explanation: