Posted by mike on .
Hers is another one: 3 people requires 3 weeks and 2 days to do a job. How long would it take for 4 people to do the same job? (Each week is 6 days)
Convert time to days only to avoid confusion.
Assuming the relation between people and time is linear, setup two fractions and set them equal to each other.

Math 
mynequa,
18