With both presses running the job takes 4 hours. Press #1 alone takes …

Question

With both presses running the job takes 4 hours. Press #1 alone takes 6 hours, so Press #2 alone takes:

Accepted Answer

C. 12 hours

1. Together they do one fourth an hour.
2. Press #1 does one sixth, leaving one twelfth.
3. Press #2 alone takes 12 hours.
_Source: OpenStax Elementary Algebra, Chapter 8, Solve Uniform Motion and Work Applications._

Answer

8 hours

Answer

14 hours

Answer

10 hours

With both presses running the job takes 4 hours. Press #1 alone takes 6 hours, so Press #2 alone takes:

Keep practising Time and Work