Question 1135956
Let {{{ n }}} = the number of minutes that go by
{{{ n*( 1 + 2 /60 ) }}} = what the fast clock 
shows after {{{ n }}} min
{{{ n*( 1 - 1/60 ) }}} = what the slow clock 
shows after {{{ n }}} min
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When is the difference in the clocks 1 hr?
{{{ n*( 1 + 2/60 ) - n*( 1 - 1/60 ) = 60 }}}
{{{ n*( 1 + 2/60 - 1 + 1/60 ) = 60 }}}
{{{ n*( 3/60 ) = 60 }}}
{{{ n = 3600/3 }}}
{{{ n = 1200 }}} min
Convert 1200 min to hrs
{{{ 1200/60 = 20 }}} hrs
9 AM plus 12 hrs is 9 PM
9 PM plus 8 hrs is 5 AM
5 AM the next morning