1000 men have provisions for 20 days. If 650 more men join them, for how many days will the provisions last now?  Choose the correct choice from the following options:
A) 12.9	B) 12.5	C) 12.6	D) 12.2	E) 12.1

Rationale: "1000 * 20 = 1650 * x x = 12.1 answer : e"
Answer: E