I drove to the beach at a rate of 40 miles per hour. If I had driven at a rate of 50 miles per hour instead, then I would have arrived 45 minutes later. How many miles did I drive?
For the last time: this question doesn't make any sense. If you drove 5 mph faster, you would have arrived EARLIER not later, so I assume you mean earlier. This has been posted too many times already. Forget the answer, if you post something, make sure the QUESTION makes sense.