A) 6 cm
B) 3-2 cm
C) 3 cm
D) 3-5 cm
Correct Answer: C
Solution :
Suppose the original radius of the circle =r cm Then, \[\pi {{r}^{2}}+22=\pi {{(r+1)}^{2}}\] \[\pi {{r}^{2}}+22=\pi ({{r}^{2}}+1+2r)\] \[22=(1+2r)\frac{22}{7}\] \[7=1+2r\] \[2r=6\] \[r=3\,\,cm\]You need to login to perform this action.
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