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In a fort there is sufficient food for 600 men for a month. If 400 more men arrive the fort then how long the food is sufficient for now?

Correct answer: B. 18 days

  • A. 20 days
  • B. 18 days
  • C. 28 days
  • D. 36 days

Explanation

The available food represents 600 men × 30 days = 18,000 man-days. With 600 + 400 = 1,000 men, it will last 18,000 man-days ÷ 1,000 men = 18 days. The likely mistake is choosing 20 days by treating the extra 400 men as a small change instead of recalculating the total consumption rate.

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