Question 4
Mike's car factory has three teams: engine production, body production and painting. Each team needs 90 minutes per car. Originally the body team starts after the engine team finishes, and painting begins after another 90 minutes. Thus one car takes 270 minutes, as in the chart (“Số xe”=car count; “Thời gian”=time).
A friend suggests that all three teams work at the same time on different cars. After the first car is completed, how many minutes are needed between successive new cars?
A friend suggests that all three teams work at the same time on different cars. After the first car is completed, how many minutes are needed between successive new cars?