Question 885615
Think of this as one car standing still
and the other traveling at the sum
of their speeds
-----------------
Let {{{ t }}} = the time in hrs
{{{ 15 = ( 20 + 55 ) * t }}}
{{{ 15 = 75t }}}
{{{ t = 15/75 }}}
{{{ t = 1/5 }}} hrs
{{{ t = ( 1/5 )*60 }}} min
{{{ t = 12 }}} min
It takes 12 minutes for them to meet