A plot is in the form of a rectangle ABCD having semicircle on BC as shown in figure. The semicircle portion is grassy while the remaining plot is without grass. The area of the plot without grass where AB = 60 m and BC = 28 m is:

• A.  \[\Rightarrow \]                      
• B.  \[r=\sqrt{\frac{x}{4\pi }}\]
• C.  \[\therefore \]                          
• D. None of these