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please finish in 30 minutes please After a snowstorm, my driveway needs to be shovelled. If Mr.Bahar did the shovelling, it would take him 20

please finish in 30 minutes please

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After a snowstorm, my driveway needs to be shovelled. If Mr.Bahar did the shovelling, it would take him 20 minutes longer than it would take me. If we work together, it would take us 30 minutes. How long does each of us take to shovel the driveway working alone

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