Four cooks cleaned 5 kg of potatoes for 10 minutes. How many cooks would have to work cleaning 9 kg of potatoes for 12 minutes?

Correct answer:

x =  6

Step-by-step explanation:

12x/9 = 4·10/5

12·x/9 = 4·10/5

60x = 360

x = 360/60 = 6

x = 6

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