You need to go from point A to point B, and then back to point A. Points A and B are 20 miles apart. You go to point B at a constant speed of 15 miles per hour. If you want your overall speed to be 30 miles per hour, how fast would you have to go from point B back to point A?

It would be impossible to achieve an overall speed of 30 miles per hour.

Posted by K Sengupta on 2008-03-21 13:06:43