SOLUTION: A shop has enough food to feed 520 people for 8 days. 312 more people arrive. How long will the food last now?

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Question 257625: A shop has enough food to feed 520 people for 8 days. 312 more people arrive. How long will the food last now?
Found 2 solutions by shahbazn, Alan3354:
Answer by shahbazn(6) About Me  (Show Source):
Answer by Alan3354(69443) About Me  (Show Source):
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A shop has enough food to feed 520 people for 8 days. 312 more people arrive. How long will the food last now?
520*8 = 4160 person-days of food
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4160/(520+312) = 5
5 days