Racing Car A and Racing Car B were driven a distance of 1 mile in oppo

Dear duahsolo,

I'm happy to respond. I don't know the source of this question, but I don't think it is a high quality question at all.

The question doesn't specify that the cars start simultaneously, and the logic of the question seems to hinge on that omission. This is devious and sneaky in a way that the GMAT Quant doesn't do. The person who wrote this question was trying to catch people in a particular trap answer, rather than model the way that the GMAT makes a question challenging.

Statement #1 is very easy: it's clearly sufficient, because less time over the same distance means higher speed.

Statement #2 is the location of the trap. If the cars started simultaneously, then this also would be sufficient and would be as easy as statement 1. When we realize that a simultaneous start has not be guaranteed, this is also easy. Clearly, this statement is irrelevant and not sufficient.

There's nothing mathematically challenging about the question. It doesn't model the GMAT Quant sections well at all: it punishes people for what they might take to be an omission in the prompt. This is not a particularly good question.

Here's a high quality GMAT DS practice question:
square and triangle

Does all this make sense?
Mike