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A piston of cross-section area $100\, cm^2$ is used in a hydraulic press to exert a force of $107\, dynes$ on the water. The cross-sectional area of the other piston which supports an object having a mass $2000 \,kg$. is
  • A$100 \,cm^2$
  • B$109\,cm^2$
  • C$2 × 10^4\,cm^2$
  • D$2 × 10^{10}\,cm^2$
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