Yolanda walked a distance of 3 miles in 90 minutes. If her speed for the first mile was 6 miles per hour, how many minutes did it take her to walk the rest of the distance.
3 miles in 90 min?
time first mile= 1/6 hr
time last two miles= 1.5-1/6=3/2-1/6=8/6hr
8/6 hr*60min=80 min