Question 662272
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
New York & Boston, 200 miles apart
D = rt, total distance traveled by the two trains is 200mi
 40t + 40(t-1) = 200mi
   80t = 240
     t = 3hr, time traveled by train leaving at 3pm
trains will meet at 6pm
and...
{{{40mph*3hr + 40mph*2hr = 200mi}}}