<PRE><B>Question 751079</B>
If 480 students would eat the food in 16 weeks,
Find the number of &quot;food-days&quot; available
480*16*7 = 53760 food days
: 
but after two weeks, 80 students join, how long will it take them to finish the remaining food?
Find number of food-days remaining after two weeks
53760 - (480*14) = 47040
Find how many days this will last with the additional students:
{{{47040/(480+80)}}} = 84 days of food which is 84/7 = 12 weeks
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