An assembly line with 20 activities is to be balanced. The total amount of time to complete all 20 activities is 40 minutes. The longest activity takes 3.0 minutes and the shortest takes 0.9 minute. The line will operate for 360 minutes per day. What is the average time to complete each activity?
1) 1.5 minutes
2) 1.8 minutes
3) 2.0 minutes
4) 2.2 minutes
