A water tank has three taps $\text{A, B},$ and $\text{C. A}$ fills four buckets in $24$ mins, $\text{B}$ fills $8$ buckets in $1$ hour and $\text{C}$ fills $2$ buckets in $20$ minutes. If all taps are opened together a full tank is emptied in $2$ hours. If a buckets can hold $5$ litres of water, what is the capacity of the tank in litres _________