Four workers

Four workers lay on the gym floor for six hours. After an hour of working together, one of the workers went to the doctor. How long will it take for the remaining three workers to complete their work?

Result

t = 6:40 h Wrong answer

Step-by-step explanation:


4·6 = 4·1 + 3·t

3t = 20


t = 20/3 = 6.66666667

t = 20/3 ≈ 6.666667

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