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?

Let the number of days be x. Total number of animals = 20 + 10 = 30
Animals 20 30
Days 6 x
Here, the number of animals and the number of days are in inverse proportion.
∴ 20/30=x/6 ⇒ 30Xx=20×6 ⇒ x=20×6/30 = 4
Hence, the food will last for four days.

Class 8 Maths Chapter 11 Exercise 13.2 Solution in Video

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