Question 668357
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,Previously Posted
Note:  t = D/r
{{{ 900/(v-25mph)-900/(v+25mph) = 1/4}}}
   3600(v+25) - 3600(v-25) = v^2 - 625
         7200*25 +625 = v^2
               425mph = v
and..
{{{2&1/4 - 2 = 1/4}}}