<PRE><B>Question 771147</B>
Always there are three aspects of solving these type of problems.

You should remember the letters FCC
F-Formula you are going to use
C-Conversion to right units
and C- calculation the last part

Formula = d=rt
we have to find r
r= d/t

time should be in hours because speed is in mph

36 minutes = 36 /60 = 3/5 hours 
1 3/5= 8/5 hours

r = 100 / (8/5)

x= 100 * 5/8

r= 125/2 = 62.5 mph</PRE>