Question

At a school camp there is enough food for 150 students for 5 days.

a How long would the food last if there were only 100
students?

Answer 1

If there were only 100 students, there would be enough food for 3 days.

Explanation:

Set up an equation:

Variable x = number of days

150/5 = 100/x

Cross multiply:

150 × x = 5 × 100

150x = 500

x = 3.3333...

Round down to a whole number which represents a full day of food.

x = 3