An empty tank was \[\frac{2}{5}\] full after \[1.5\,l\] of water was poured in it. The base area of the tank was\[250\text{ }c{{m}^{2}}\]. What was the height of the tank?

• A.  \[15\,cm\]                         
• B.  \[5\,cm\]           
• C.  \[4\,cm\]           
• D.         \[8\,cm\]