At a refugee camp, the food supplies were enough to feed 300 refugees for 45 days. But 60 more refugees joined after 15 days. For how many days would the rest of the food supplies last?

25 days

Formula to be used here,

\( { M}_{1 } \) x \( { D}_{1 } \)  = \( { M}_{2 } \) x \( { D}_{2 } \)

where, M = No. of Men, D = No. of Days,

⇒ Putting values in the formula,

⇒ 300 x (45-15) = 360 x \( { D}_{2 } \)

⇒ \( { D}_{2 } \) = 25 days.