A town with a population of 1000 has provision for 30days, after 10 days 600 more men added, how long will the food last at the same rate ?
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let us take 'n' as unit of food for a day
Total provision available = 1000people* 30days *n = 30000n
In 10 days the food they consume = 1000* 10*n = 10000n
Remaining food = 30000n - 10000n = 20000n
number of people now have = 1000 + 600 = 1600
Food needed for one day now = 1600n
No of days the food will last = 20000n/1600n = 12.5days
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