Four workers

Four workers lay the gym floor in 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

Solution:


4•6 = 4•1 + 3•t

3t = 20

t = 203 ≈ 6.666667

Our simple equation calculator calculates it.



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