Question

A group of 9 friends used 6 laptops to do their Math project work for 2 hours. They took turns to work on the laptops. At any time, 6 of them used the laptops while the other 3 watched. Each of them used the same amount of time with the laptops. How long did each person use the laptop?
2 hr * 6 = 12 hr
12 hr / 9 = 1.33 hr
80 minutes

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