[Hot Tabasco]

You may think you're smart but you missed the key:

no faster than an average speed of 15 mi/h

Because it is so old, the car can climb the first mile—the ascent—no faster than the average speed of 15 mph

The car "CAN" travel no faster than 15 mph but did it actually do it?

AND it does not state how long it took to traverse the first uphill mile, YOU merely assumed it.........

NO MENSA FOR YOU!

[Dr. Sivana]

no faster than an average speed of 15 mi/h
Because it is so old, the car can climb the first mile—the ascent—no faster than the average speed of 15 mph
The car "CAN" travel no faster than 15 mph but did it actually do it?
AND it does not state how long it took to traverse the first uphill mile, YOU merely assumed it.........
NO MENSA FOR YOU!M/i>

I didn't assume anything. I did know that even if it hit all of its numbers that the car cannot possibly get down a hill instantaneously. Therefore, it doesn't matter how fast the car did go, as the given was that it did NOT go up the hill faster than 15 mph. If the car were capable of going a tad faster, and I wanted to allow for the possibility that it didn't use all of its speed, then I would have had to bring in parentheses and all sorts of mesy stuff that these types of problems rarely have.