A garrison of 500 men had provisions for 27 days. After 3 days, a reinforcement of 300 men arrived. For how many more days will the remaining food last now?
Answer: A
The remaining food was supposed to last for 500 men for 27-3 = 24 days. Total remaining food = \(500 \times 24\) man-days. Now, the number of men is \(500+300=800\). The food will last for \((500 \times 24) / 800 = 12000 / 800 = 15\) days.