Mathematics, 20.07.2021 22:00 jak000067oyyfia

A person can plow all the driveways on his street with his new four-wheel-drive truck in 6 hours. Using a snow blade on a lawn tractor, his neighbor can plow the same number of driveways in 9 hours. How long would it take them to do the work together?

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A person can plow all the driveways on his street with his new four-wheel-drive truck in 6 hours. Us...