A can do a piece of work 20 days. B can do work in 35 days. In how many days they will complete the work together? Pick: A) 15 days B) 16.32 days C) 12.72 days D) 17 days E) 18 days
L12.72 daysM = 140, Ratio= 20:35=4:7   No of days= 140/(4+7) = 90/5 = 12.72 days   ANSWER:12.72 days
<result>C</result>
A can do a piece of work 20 days. B can do work in 35 days. In how many days they will complete the work together?