Pipe A can fill an empty tank in 18 hours and pipe B can fill the same empty tank in 24 hours. If both the pipes are opened simultaneously, how much time (in hours) will they take to fill the empty tank?

A

$$11\frac{3}{7}$$

B

$$10\frac{1}{7}$$

C

$$10\frac{2}{7}$$

D

$$11\frac{2}{7}$$