Answer :

Given: Number of people living off the food stock for 70 days = 500

To find: Number of days the stock will last if 700 people live off.


Formula:


Substituting x1 = 500, y1 = 70 x2 = 700 in the formula,



Gives y2 =


If 200 more people join, the food will last for 50 days.


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