Question : At a refugee camp, the food supplies were enough to feed 300 refugees for 45 days. But 60 more refugees joined after 15 days. For how many days would the rest of the food supplies last?
Option 1: 23 days
Option 2: 24 days
Option 3: 22 days
Option 4: 25 days
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Correct Answer: 25 days
Solution : We know, $M_1D_1= M_2D_2$ Where $M_1$ and $M_2$ are persons and $D1$ and $D_2$ are days. According to the question, $300×(45-15)=(300+60)×D_2$ ⇒$D_2=\frac{300×30}{360}=25$ days Hence, the correct answer is 25 days.
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