There is enough provisions for 700 men in an army camp for 25 days. If there were 300 men less, how long will the provision last?  Choose the correct choice from the following choices:
A) 30 days
B) 40 days
C) 50 days
D) 59 days
E) 65 days

Rationale: "exp : we have , m 1 d 1 = m 2 d 2 700 * 25 = 300 * d 2 d 2 = 700 * 25 / 300 = 59 days . answer : d"
Answer: D