1000 men have provisions for 18 days. If 400 more men join them, for how many days will the provisions last now?	Answers:
A) 12.9 B) 12.8 C) 12.6 D) 12.2 E) 12.1

Rationale: 1000 * 18 = 1400 * x x = 12.8 answer : b
Answer: B