Machine A can make 350 widgets in 1 hour, and machine B can make 250 widgets in 1 hour. If both machines work together, how much time will it take them to make a total of 2000 widgets?	Choose the correct choice from the following
A) 3 hour and 20 minutes  B) 3 hour and 24 minutes  C) 3 hour and 30 minutes  D) 3 hour and 36 minutes  E) 3 hour and 40 minutes
(350+250)t=2000   600t=2000   t=10/3   t=3 hour and 20 minutes   3 hour and 20 minutesnswer: 3 hour and 20 minutes
<result>A</result>
Machine A can make 350 widgets in 1 hour, and machine B can make 250 widgets in 1 hour. If both machines work together, how much time will it take them to make a total of 2000 widgets?