Answer:
The speed of the van traveling south is 92 miles per hour
Step-by-step explanation:
The van traveling north travels at a speed 10 miles per hour faster than the one traveling south.
Let the speed of the one traveling south be x miles per hour
The distance traveled by the van traveling north is:
10 * 2.5 = 25
The distance traveled by the van traveling south is:
2.5x
The distance between the vans is:
25 + 2.5x = 255
2.5x = 255 - 25
2.5x = 230
x = 230/2.5
= 92
The speed is 92 miles per hour