A) \[6\times {{10}^{-3}}\]
B) \[6\times {{10}^{-5}}\]
C) \[3\times {{10}^{-3}}\]
D) \[2\times {{10}^{-3}}\]
Correct Answer: A
Solution :
\[\delta *=0.5\,\,mm,\] \[\rho =1.2\,\,\text{kg/}{{\text{m}}^{\text{3}}}\text{,}\] \[u=10\,\text{m/s}\] Loss of mass rate of flow of air \[=\delta *\rho u\] \[=0.5\times {{10}^{-3}}\times 1.2\times 10=6\times {{10}^{-3}}\,\,\text{kg/m}\]
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