A) 20%
B) 10%
C) 19%
D) 25%
Correct Answer: C
Solution :
[c] \[\pi {{r}^{2}}-\pi {{(90%r)}^{2}}=\pi {{r}^{2}}\left( 1-\frac{81}{100} \right)=19%.\,\,\pi {{r}^{2}}\] \[\therefore \] Area is reduced by 19 %.You need to login to perform this action.
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