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A river $10\,m$ deep is flowing at $5\,m/s$. The shearing stress between horizontal layers of the river is :- $(\eta  = 10^{-3}\,SI\,unit)$
  • A$10^{-3}\,N/m^2$
  • B$0.8\times 10^{-3}\,N/m^2$
  • C$0.5\times 10^{-3}\,N/m^2$
  • D$1\,N/m^2$
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