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The radius (r), length ( A ) and resistance (R) of a metal wire was measured in the laboratory as r = (0.35 ± 0.05) cm R = (100 ± 10) ohm A = (15 ± 0.2) cm The percentage error in resistivity of the material of the wire is:

1. 35.6%
2. 39.9%
3. 25.6%
4. 37.3%

Correct answer: 39.9%

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