A certain number of men can do a work in 40 days . If there were 5 men less it could be finished in 10 days more . How many men are there? Choose the correct choice from the following choices
A) 15 men
B) 25 men
C) 18 men
D) 12 men
E) 14 men

Rationale: "explanation : x * 40 = ( x - 5 ) * 50 5 x - 4 x = 25 x = 25 men answer : option b"
Answer: B