On Fri May-20-2011 18:51, Gary Perkins (1:393/31) wrote to Jeff Snyder:

[...]
 > However, that obviously does not make any sense. Why would the 
 > faster man choose to slow down to 4.5 hours? He wouldn't. He'd still 
 > finish in three hours...at least so me thinks.  :)

 GP> You're overthinking this.  It's not a trick question -- there's
 GP> actually a clear mathematical formula for two people working
 GP> together at different rates to accomplish the same task.

 GP> If they start at opposite sides, since one works twice as fast as
 GP> the other, by the time they're "halfway" done, the faster one will
 GP> meet the slower one probably 3/4 of the way.

 GP> My original answer was something like 2:45, but I wouldn't be
 GP> surprised if it's a smooth 1:30 (1/4 of 6 hours).

Thank you for the support, Gary.  Here then, is the formula:


6 hours = 1 = .167
          -
          6

3 hours = 1 = .333
          -
          3

That should give you the answer.


Regards,

Roger 
--- timEd/386 1.10.y2k+