Question 697444
8 inches is {{{ 8/12 = 2/3 }}} ft
3 ft is {{{ 9/3 }}} ft
{{{ 9/3 + 2/3 = 11/3 }}}
{{{ 4*(11/3) = 44/3 }}}
{{{ 44/3 = 14 + 2/3 }}}
This is more than 14 ft, so the shortest board
that will work is 15 ft