A) 5 cm
B) 10 cm
C) \[5\sqrt{2}\,cm\]
D) \[10\sqrt{2}\,cm\]
Correct Answer: D
Solution :
Area of circle \[{{C}_{2}}=\frac{1}{2}\] Area of circle \[{{C}_{1}}\] \[\therefore \] \[\pi \,{{r}^{2}}=\frac{1}{2}\times \pi \times {{20}^{2}}\] or \[{{r}^{2}}=200\] or \[r=10\sqrt{2}\]You need to login to perform this action.
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