प्रत्येक राउंड में 10 नये प्रश्न प्रश्न : ( 3 of 10 ) If William can finish the work in 12 days and Matthew can finish the same work in 16 days, then in how many days both can finish the work together? (A) 14 days (B) 28 days (C) 12 6/7 days or 12.857 days (D) 6 6/7 days or 6.857 days