A can do a piece of work 30 days. B can do work in 55 days. In how many days they will complete the work together?	Choose the correct choice from the following choices:
A) 15 days	B) 16 days	C) 19.4 days	D) 17.2 days	E) 18 days
L19.4 daysM = 330, Ratio= 30:45=6:11   No of days= 330/(6+11) = 330/17 = 19.4 days   ANSWER:19.4 days
<result>C</result>
A can do a piece of work 30 days. B can do work in 55 days. In how many days they will complete the work together?