A) 6%
B) 3%
C) 4%
D) 5%
Correct Answer: B
Solution :
\[T=2\pi \sqrt{\frac{l}{g}}\] \[\therefore \]\[\frac{\Delta T}{T}\times 100=\frac{1}{2}\left( \frac{\Delta l}{l}+\frac{\Delta g}{g} \right)\times 100\] \[=\frac{1}{2}(2%+4%)=3%\]
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