Set up a proportion where x is the amount of time it would take to rake 5 bags.
[tex] \frac{3}{16} = \frac{5}{x} [/tex]
Then crossmultiply
3x = 80.
Divide by 3 on both sides to isolate the variable x
x = 26 and 2/3
So it would take 26 and 2/3 minutes or 26 minutes, 40 seconds to rake 5 bags.