1850 men have provisions for 15 days. If 150 more men join them, for how many days will the provisions last now?  Options.
A) 12.9 B) 12.0 C) 13.9 D) 13.5 E) 12.1

Rationale: "1850 * 15 = 2000 * x x = 13.9 answer : c"
Answer: C