Question 1101539
Car left {{{3/4}}} hour after the bus and car traveled for {{{1&3/4}}} hours to catchup.  Bus traveled for 2.5 hours.

<pre>
         SPEED           TIME          DISTANCE

BUS          63          {{{2&1/2}}}          d

CAR          r           {{{1&3/4}}}          d
</pre>

{{{(1&3/4)r=(2&1/2)*63}}}

-

{{{r(7/4)=(5/2)63}}}


{{{r=(5*63/2)(4/7)}}}


{{{highlight(r=90)}}}{{{kilometers/hour}}}