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In Kitchen A, the cooks shown prepare the meals shown in 4 hours. How many cooks does Kitchen B need to prepare its meals in 3 hours, if all cooks work at the same rate?

Class 8Workers, Days and HoursDirect and Inverse Proportions
  • A9 cooks
  • B6.75 cooks
  • C10 cooks
  • D12 cooks

Step-by-Step Solution

A: 5 cooks, 5 plates = 300 meals, 4 h, so 20 cook-hours for 300 meals. B: 9 plates = 540 meals need cook-hours; in 3 h that is cooks.
Answer: D) 12 cooks

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