<p>Unless I misinterpreted the problem, number 2 has insufficient information.</p>
<p>The question is equivalent to asking, which takes longer: O.J. driving 2/3 distance from A to B or N.S. driving full distance from B to A. But since the problem doesn’t tell you the relative speed of O.J. and N.S., it’s impossible to determine the answer.</p>
<p>(O.J. = Old Junky, N.S. = New Sporty)</p>