Question 1115128
Let the distance the first car covers equal {{{d[1]}}} and the second car {{{d[2]}}}.
So then you know,
{{{R*t=d}}}
So find {{{t}}} when,
{{{d[1]+d[2]=198}}}
{{{R[1]*t+R[2]*t=198}}}
{{{60t+72t=198}}}
{{{132t=198}}}
{{{t=1.5}}}{{{hr}}}