Question

In a camp, there is enough flour for 300 persons for 42 days. How long will the flour last if 20 more persons join the camp?​

Answer 1

Total no. of servings available = 300 × 42

= 12600

If 20 more persons join, no. of days flour lasts

= 12600/ 320

= 39.37 ≈ 39 Days

Answer 2

Let the duration for which the food will last be D days.

Then,

Total provision= New provision

300x42= 320x D

D=300x42/320

=39.37 days