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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
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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

User Ashish Mukarne
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(1)/(60)+(1)/(40)=(1)/(x)\\ (2)/(120)+(3)/(120)=(1)/(x)\\ (5)/(120)=(1)/(x)\\ 5x=120\\ x=24
User Nicolas Schubhan
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