Question 1048146
RT=D, constant travel rate rule


<pre>
                SPEED        TIME        DISTANCE
CAR             60            2           d+30
BUS             r             2           d
</pre>

Both d and r are unknown, and you can solve for both.



{{{(60)(2)=d+30}}}
{{{d=60*2-30}}}
{{{highlight_green(d=90)}}}



{{{(r)(2)=d}}}
{{{r=d/2}}}
{{{r=90/2}}}
{{{highlight(r=45)}}}---------answer to the question