Question 487963
Think of this as one car standing still and
the other one moving at the sum of their
speeds.
{{{ 255 = ( 30 + 45 )*t }}}
{{{ t = 255/75 }}}
{{{ t = 3.4 }}} hrs
{{{ .4 }}} hrs = {{{ .4*60 = 24 }}} min
{{{ t }}} = {{{3}}} hrs and {{{24}}} min