Mathematics, 02.10.2019 23:10, gabelawson6996

Ron's recycle shop had an old paper-shredding machine. business was good, so he bought a new paper-shredding machine. the old machine could shred a truckload of paper in 4 hours. the new machine could shred the same truckload in 2 hours. how long will it take to shred the same truckload of paper if ron runs both shredders at the same time?

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Ron's recycle shop had an old paper-shredding machine. business was good, so he bought a new paper-s...