Question

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?

Answer 1

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

$\begin{array}{ccc}Animals& 20& 30\\ Days& 6& x\end{array}$

Here, the number of animals and the number of days are in inverse proportion
$\therefore \frac{20}{30}=\frac{x}{6}\Rightarrow 30\times x=20\times 6\Rightarrow x=\frac{20\times 6}{30}=4$
Hence, the food will last for four days.