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Question

There is enough food in a camp to last for 60 days if each of the 30 soldiers present at the camp eat 4 times a day. After 40 days, 10 soldiers left the camp and remaining ate only 3 times a day. For how many days (from start) will the food last?

A 70 days

B 75 days

C 85 days

D 80 days

E 90 days

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