Question 524719
Think of this as one train standing still and the 
other moving at the sum of their speeds
Let {{{t}}} = time for them to get {{{ 285 }}} mi apart
{{{ 285 = ( 50 + 64 )*t }}}
{{{ t = 285/114 }}}
{{{ t = 2.5 }}}
It will take them 2.5 hrs