Question

A farmer has enough food to feed 48 cattles for 6 days. How many days will the food last if there were 144 cattles ?

• A. 1 day
• B. 5 days
• C. 4 days
• D. 2 days

Answer 1

The correct option is D 2 days

As animals increases, the number of days decreases. This is in inverse proportion.

Let the required number of days be t.

Number of cattle	Number of days
48	6
144	t

So, using arrow method:
$\frac{48}{144}=\frac{t}{6}$
On cross multiplication,
$t=\frac{48}{144}\times 6=2$
So, food will last for 2 days if there were 144 cattles.