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Guilliam828
Guilliam828 Guilliam828
  • 31-08-2015
  • Mathematics
Answered

Sanford can assemble a computer in 60 minutes. Colleen can assemble a computer in 40 minutes. If they work together, how many minutes does it take them to assemble a computer? 5 minutes 6 minutes 20 minutes 24 minutes

Verified Answer :

konrad509
konrad509 konrad509
  • 31-08-2015

\(\dfrac{1}{60}+\dfrac{1}{40}=\dfrac{1}{x}\\ \dfrac{2}{120}+\dfrac{3}{120}=\dfrac{1}{x}\\ \dfrac{5}{120}=\dfrac{1}{x}\\ 5x=120\\ x=24\)

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