A) One-fourth
B) Half
C) One-eighth
D) One-sixteenth
Correct Answer: B
Solution :
Suppose radius = r Then, area = \[\pi {{r}^{2}}\] Now, new area \[=\frac{1}{4}\pi {{r}^{2}}\] \[\pi {{R}^{2}}=\frac{1}{4}\pi {{r}^{2}}\] \[R=\frac{r}{2}\] Hence, its radius will be half.
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