A trucker drove for 4 hours at an average speed of 60 miles per hour (mph) and then for 3 hours at an average speed of 30 mph. What was his total distance traveled?
Let D_1 = first distance.
Let D_2 = second distance
D_1 = 4(60)
D_1 = 240 miles.
D_2 = 3(30)
D_2 = 90 miles.
Let D_1 + D_2 = total distance
D_1 + D_2 = 240 miles + 90 miles
D_1 + D_2 = 330 miles.
The truck driver drove a total distance of 330 miles.
