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17 December, 15:11

Paul can install a

300-square-foot hardwood floor in 18 hours. Matt can install the same

floor in 22 hours. How long would it take Paul and Matt to install the

floor working together?

4 hours

9.9

hours

13.2 hours

30

hours

+4
Answers (1)
  1. 17 December, 15:29
    0
    Paul installs (300/18) square feet per hour

    Matt installs (300/22) square feet per hour

    Let t be the time in hours

    (300/18) t + (300/22) t = 300

    (1000/33) t = 300

    t = 300 / (100/33) = 9.9 hours
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