A, B and C can do a work in 60, 30 and 45 days respectively. If they work together, in how many days will they complete the work? Select the correct option
A) 12 4/5 days B) 13 4/5 days C) 13 1/5 days D) 13 2/5 days E) 12 4/5 days
One days's work of A, B and C = 1/60 + 1/30 + 1/45   = (3+6+4)/180 =13/180   A, B and C together can do the work in 13 4/5 days.   ANSWER:13 4/5 days
<result>B</result>
A, B and C can do a work in 60, 30 and 45 days respectively. If they work together, in how many days will they complete the work?