Question 850418
Think of one of the trains as standing still and
the other one moving at the sum of their speeds
Let {{{ t }}} = time in hrs for them to meet
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{{{ 560 = ( 110 + 90 )*t }}}
{{{ t = 560/200 }}}
{{{ t = 2.8 }}} hrs
Convert {{{ .8 }}} hrs to minutes
{{{ .8*(60/1) = 48 }}}
It will take 2 hrs and 48 min for them to meet
check:
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{{{ d[1] = 110*t }}}
{{{ d[1] = 110*2.8 }}}
{{{ d[1] = 308 }}} mi
and
{{{ d[2] = 90t }}}
{{{ d[2] = 90*2.8 }}}
{{{ d[2] = 252 }}} mi
and
{{{ d[1] + d[2] = 308 + 252 }}}
{{{ d[1] + d[2] = 560 }}}
as it should -OK