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