Twenty men complete a work in 16 days. Twenty women complete the same work in18 days. If all these men and women worktogether, then the numberof days required to complete that work

A

10 $$\frac{1}{3}$$

B

9 $$\frac{8}{17}$$

C

9 $$\frac{1}{15}$$

D

8 $$\frac{8}{17}$$