Question 332754
Five machines can produce 12 gallons of Glorious Goo in 10 days.
 How many days would it take 4 machines to produce 48 gallons?
:
Using machine-days as a work unit
5*10 = 50 machine days to produce 12 gal
that's
{{{50/12}}} = 4{{{1/6}}} machine-days/gal 
:
"How many days would it take 4 machines to produce 48 gallons?"
48 * 4{{{1/6}}} = 200 machine-days to produce 48 gal
then
4d = 200
d = {{{200/4}}}
d = 50 days
:
:
4 machines take 50 days to produce 48 gal