Question

Six machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the Job in 8 days?A. 2B. 3C. 4D. 6E. 8

Answer 1

Answer:

The answer to your question is letter C

Step-by-step explanation:

This is a problem with the inverse rule of three because we expect that more machines can complete the same work in fewer days.

                              6 machines ------------------  12 days

                              x machines -------------------  8 days

               x machines = $\frac{(8 days)(6 machines)}{12 days}$

                            $x machines = \frac{48 machines}{12}$

                                   x = 4 machines