Joe is driving to the airport to pick up his wife. If he drives at his current speed, he'll arrive on time. If he drives 5 miles per hour faster, he'll arrive 12 minutes early. If he were to drive 5 miles per hour slower instead, he'd arrive 15 minutes late.

How far away is the airport?

Thanks, Charlie, for another fun-to-solve problem.  I'm surprised we haven't had more like this one on the site already.  It seems ordinary enough.  As do most members of Mensa.

Good solution, Jyqm.

Posted by Mindrod on 2006-06-27 09:56:08