check my work please

Question

For his business, Gil has determined that the time it takes to finish a job varies inversely with the number of workers. This can be expressed as:
==\ensuremath{T=\frac{k}{w}}== where T = time, k is a constant, and w = number of workers. Gil’s records show that 18 workers can finish a job in 6 days. How many days will it take 12 workers to do the same job?
A 4
B 9***
C 12
D 36

Answer 1

yes
18*6 = 9*12

Answer 2

But two of us already went through that.