Mathematics, 05.06.2020 07:58 jessicamendozacelis2

Al can wash a car in 40 minutes, Bob can wash a car in 30 minutes, and Carl can wash a car in 60 minutes. How long, in minutes, would it take them to wash a car, working together?

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Al can wash a car in 40 minutes, Bob can wash a car in 30 minutes, and Carl can wash a car in 60 min...

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