Pipe 'A' can fill a tank in 5 hours, but due to a tiny hole at the bottom it wok 8 hours to fill the tank. Then the time, in hours. for the fttll tailk of water to be drained through the tiny hole is (in hours)

A

$$10\frac{3}{4}$$

B

$$11\frac{1}{4}$$

C

$$13\frac{1}{3}$$

D

$$14\frac{2}{3}$$