Question 477378
The number of chairs n built is directly proprtional to the number of hours worked in a day h, and to the number of days d worked.

==> n = kdh

==> 1 = k(4)(6) ==> k = 1/24

==> {{{n = (dh)/24}}}

==> {{{1 = (3h)/24}}} ==> d = 8, the number of days.