Mathematics, 29.04.2021 21:20 lelen2021

A new street sweeping machine can sweep a town's streets in 20 fewer hours than it takes the old machine. Working together, the two machines can complete the job in 24 hours. How long does it take each machine to complete the job working alone?

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A new street sweeping machine can sweep a town's streets in 20 fewer hours than it takes the old mac...