Question 624870
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Note:   D = rt   or t = D/r
Trevor drove 4 hours at the rate of 50 miles per hour.  {{{D = 50mph*4hr = 200mi}}} 
How long the same distance take trevor if he drove at 40mph? {{{t = 200mi/40mph = 5hr}}}