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प्रश्न
125 pupils have food sufficient for 18 days. If 25 more pupils join them, how long will the food last now? What assumption have you made to come to your answer?
बेरीज
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उत्तर
Pupils in the beginning = 125
More pupils joined = 25
Total pupils = 125 + 25 = 150
Food is sufficient for 125 pupils for = 18 days
Food will be sufficient for 1 pupil for = 18 × 125 days (less pupil more days)
and food will be sufficient for 150 pupils = `(18 xx 125)/150` days (more pupil more days)
= `(18 xx 5)/6` = 15 days
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