A) 6
B) 9
C) 8
D) 10
Correct Answer: B
Solution :
[b] Given \[R=\frac{\rho \ell }{\pi {{r}^{2}}}\],then \[\frac{\Delta R}{R}\times 100\] \[=\frac{\Delta \rho }{\rho }\times 100+\frac{\Delta \ell }{\ell }\times 100+2\frac{\Delta r}{r}\times 100\] \[=1%+2%+2\times 3%=9%\]
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