A set of 10 new questions in each round Question: ( 1 of 10 ) Justin can finish a work in 79 days. Brandon can finish the same work in 84 days while Benjamin can finish the work in 89 days. How long will it take to finish it if they work together? (A) 27 19743/21143 days or 27.934 days (B) 84 days (C) 63 days (D) 54 19743/21143 days or 54.934 days