Question 1046459
<pre>
                      RATE         TIME         DISTANCE
HALF HOUR START                   {{{1/2}}}           25
FREEWAY                            t             d

Totals                             4           245
</pre>


The asked question is what distance for 1.75 hours on the freeway.  The unknown time and distance in the table above can be found, and the speed done on the freeway can then be found.


Use the sums for the "Totals" from the table.


{{{t+1/2=4}}}
{{{t=3&1/2}}}
-
{{{d+25=245}}}
{{{d=245-25}}}
{{{d=220}}}
-
Speed used on the freeway was  {{{d/t=220/(3&1/2)=220/(7/2)=440/7}}}, miles per hour.  Now you "know".


How far Sarah travel in 1.75 hours while at {{{440/7}}} miles per hour?