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प्रश्न
In a camp, there is enough flour for 300 persons for 42 days. How long will the flour last if 20 more persons join the camp?
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उत्तर
∵ For 300 persons flour is enough for 42 days.
∴ For 1 person’s flour enough = 300 × 42 = 1260 days.
Now, 20 more persons join the camp.
So, total persons = 300 + 20 = 320
∴ For 320 persons flour enough = `12600/320 = 3/8` days
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