A set of 10 new questions in each round Question: ( 9 of 10 ) Emma can finish a work in 80 days. Helen can finish the same work in 85 days while Samantha can finish the work in 90 days. How long will it take to finish it if they work together? (A) 28 116/433 days or 28.268 days (B) 85 days (C) 63.75 days (D) 56 116/433 days or 56.268 days