Answer:
c: 15
Step-by-step explanation:
20-15=5
35-30=5
I think it's A. 12.1 mm
Let the time = x
Distance = Speed x time
One train is 75x, the other train 85x
Add together to equal total distance:
75x + 85x = 384
Simplify:
160x = 384
Divide both sides by 160:
x = 384 / 160
x = 2.4 hours