A set of 10 new questions in each round Question: ( 4 of 10 ) If Karen can finish the work in 21 days and Kevin can finish the same work in 25 days, then in how many days both can finish the work together? (A) 46 days (B) 23 days (C) 22 19/46 days or 22.413 days (D) 11 19/46 days or 11.413 days