Question

A food stock can feed 800 children for 60 days. If 400 more children arrive, how long will the stock last?

• A. 30
• B. 40
• C. 20
• D. 10

Answer 1

The correct option is B

40

Since the number of children increases, this means that the amount of food will last a few days less. This is a case of indirect proportionality.
Total number of students = 800 + 400 = 1200
$\therefore 800\times 60=1200\times x$
$\Rightarrow x=\frac{800\times 60}{1200}$
$\Rightarrow x=40days$