Answer: In the first 2 hours, Doug drove 2 * 50 = <<250=100>>100 miles on the state road.
In the next 3 hours, he drove 3 * 60 = <<360=180>>180 miles on the interstate highway.
Therefore, he drove a total of 100 + 180 = <<100+180=280>>280 miles.
Since we don't know his distance from home before he began driving, we cannot calculate his distance from home after 5 hours of driving.
Explanation: