Question

Forty students stay in a hostel. They had food stock for 30 days. If the students are doubled then for how many days the stock will last?

Answer 1

Let the required number of days be x.

Number of days	30	x
Number of students	40	Doubled = 2 x 40 = 80

As the number of students increases the food last for less number of days

∴ They are in inverse proportion.

x = 15

The food stock lasts for 15 days.