No, no, no, no, no. The land speed and water speed should be the opposites of what I wrote far below: CORRECTION: The water speed is 1 unit/hour, and the land speed is 1.25 units/hour. --Dan <From a recent NY Times article in the science section: PUZZLE: --------------------------------------------------------------- Let there be a lake on the plane filling up the unit circle centered at the origin. The rest of the plane is level ground. Find the quickest path from (-2,0) to (3,1), possibly passing through the lake, for an amphibious vehicle whose land speed is 1 unit/hour, and whose water speed is 1.25 units/hour. --------------------------------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ OOPS OOPS OOPS OOPS OOPS OOPS OOPS OOPS OOPS OOPS OOPS OOPS Sometimes the brain has a mind of its own.