Taps A and can fill a tank in 15 minutes and 10 minutes, respectively while tap C can empty the full tank in x minutes. If all the three taps are opened together, the tank is filled completely in 8 minutes. Tap C alone will empty on part of the tank in 5 Tap calone will empty $$\frac{3}{8}$$ th part of the tank in:

A

10 minutes

B

10 $$\frac{1}{2}$$ minutes

C

9 minutes

D

8 $$\frac{1}{2}$$ minutes