A) \[928\,kg\,{{m}^{-3}}\]
B) \[650\,kg\,{{m}^{-3}}\]
C) \[425\,kg\,{{m}^{-3}}\]
D) \[800\,kg\,{{m}^{-3}}\]
Correct Answer: A
Solution :
\[{{h}_{oil}}{{\rho }_{oil}}={{h}_{water}}{{\rho }_{water}}g\] \[140\times {{\rho }_{oil}}=130\times {{\rho }_{water}}\] \[{{\rho }_{oil}}=\frac{13}{14}\times 1000\,kg/{{m}^{3}}\] \[{{\rho }_{oil}}=928\,kg\,\,{{m}^{-3}}\]
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