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Mathematics, 21.07.2019 08:00 alwaysneedhelp8420

Lisa can shovel snow from her driveway in 60 minutes. jim can do the same job in 35 minutes. how long would it take lisa and jim to shovel the driveway if they worked together?

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Lisa can shovel snow from her driveway in 60 minutes. jim can do the same job in 35 minutes. how lon...
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