Question 598521
If 6 machines can make 1000 bottles in 40 minutes, then
1 machine can make 1000 bottles in {{{ 6*40 = 240 }}} minutes ( 6 times as long )
If 8 machines are used, it will take 1/8 of that time, or
{{{ 240/8 = 30 }}}  min
If 2 machines are added, it will take 30 minutes to make 1000 bottles