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Question 05.
A farmer has enough food to feed 20 animals in his cattle for 6 days. How long would the food last if there were 10 more animals in his cattle?


Solution

Let the number of days be x.
Total number of animals = 20 + 10 = 30

Animals2030Days6x 

Here, the number of animals and the number of days are in inverse proportion
 2030=x6 30×x=20×6 x=20×630=4
Hence, the food will last for four days.

Mathematics
NCERT Textbook
Standard VIII

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