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Mathematics, 21.09.2019 09:00 madmar
Ue can wash a car in 1 hour. steve can wash a car twice as fast as sue. how long will it take them to wash a car if they work together, but sue starts 30 minutes before steve?
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Ue can wash a car in 1 hour. steve can wash a car twice as fast as sue. how long will it take them t...
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