Answer:
The position difference between them at time 4t is 10m.
Step-by-step explanation:
A velocity-time graph illustrate the movement of an object from one location to another given some of its parameters. The slope of the graph gives the acceleration of the object, and the total area under the graph gives the total distance covered by the object.
From the given graph, the starting points for both cars are not the same neither their stopping point. Initially, the starting position difference between the cars is 10m. The position difference between them at time 4t at the end is 10m.