chef p can prepare 10 dishes in 8 hours ,chef q can prepare the same number of dishes in 10 hours ,while chef R can prepare in 12 hours .The three chefs started preparing a dish together at 9 am. if chef p leaves from work at 11 am.leaving q and r to complete the dish.At what time the dish will be complete?
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About 1-2 am or something like that
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