A conical flask of radius r and height h is full of water. It is emptied into another conical flask of radius xr. If this flask becomes fall, what is its height?

• A.  \[{{m}^{2}}\]                     
• B.  \[8070{{m}^{2}}\]
• C.  \[8270{{m}^{2}}\]                         
• D.  \[8370{{m}^{2}}\]