Question 6
Lily, Timmy and Sara need 12 days to complete a task together. If Lily works alone, she will finish the task in 24 days. If Timmy works alone, he will finish it in 36 days. How many days will it take Sara to complete the task alone?
Editorial rate assumption: each person works at a constant rate that is unchanged when they work together.
Editorial rate assumption: each person works at a constant rate that is unchanged when they work together.