10,000 small balls, each weighing 1 gm, strike one square cm of area per second with a velocity 100 m/s in a normal direction and rebound with the same velocity. The value of pressure on the surface will be [MP PMT 1994]

• A.                         \[2\times {{10}^{3}}\,N/{{m}^{2}}\]                        
• B.                             \[2\times {{10}^{5}}\,N/{{m}^{2}}\]          
• C.                         \[{{10}^{7}}\,N/{{m}^{2}}\]                  
• D.                         \[2\times {{10}^{7}}\,N/{{m}^{2}}\]