Carmen drove from Blairtowa to Ore City, a distance of 80 miles. From Ore City she drove on to Janesville,
and then drove back to Blairtown. The ratio of
Carmen's driving times on the first second, and third
segments of the trip, respectively, was 5:2:4, ai she
drove at the same average speed on each segment.
What was Carmen's total driving distance, in miles, for
the 3 segments of the trip?