A) 0.05%
B) 0.0025%
C) 0.25%
D) 0.1%
E) 0.2%
Correct Answer: D
Solution :
Let the radius of circle be 100 unit. Then, area of circle\[=10000\pi sq\]unit The error in the radius is 0.05% Therefore, new radius is 100.05 unit. \[\therefore \] New area\[=10010.0025\text{ }sq\]unit \[\therefore \] Error in area \[=\frac{10010.0025\pi -10000\pi }{10000\pi }\times 100%\] \[=0.1%\]
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