A work which could be finished in 10 days was finished 3 days earlier after 10 more men joined. The number of men employed was?  Choose the correct choice from the following:
A) 15 B) 20 C) 88 D) 71 E) 11

Rationale: "x - - - - - - - 10 ( x + 10 ) - - - - 6 x * 10 = ( x + 10 ) 6 x = 15 \ answer : a"
Answer: A