A) \[4.5%\]
B) \[6%\]
C) \[2.5%\]
D) \[3.5%\]
Correct Answer: A
Solution :
\[\rho =\frac{m}{{{\ell }^{3}}}\] \[\frac{d\rho }{\rho }=\frac{dm}{m}+3\frac{d\ell }{\ell }\] \[\frac{d\rho }{\rho }\times 100=\frac{dm}{m}\times 100+3\frac{d\ell }{\ell }\times 100\] \[=1.5+3\times 1=4.5%\]
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