Stan drove 300 miles in 5 hours, 20 minutes. Next, he drove 360 miles in 6 hours, 40 minutes. What was Stan's average speed in miles per hour for the total trip?
5 hr 20 min = 5 + 1/3 hr = 16/3 hr
6 hr 40 min = 6 + 2/3 hr = 20/3 hr
Avg rate =
Total distance / Total Time =
[ 300 + 360 ] / [ 16/3 + 20/3 ] =
660 / [ 36/3 ] =
660 / 12 =
55 mph
Oh thank you so much CPhill!!!
