A) \[\frac{3}{2}\]
B) \[\frac{5}{2}\]
C) 3
D) 5
Correct Answer: B
Solution :
AM = r - 1 \[\therefore \]Using pythogoras theorem is \[\Delta CAM\] \[{{2}^{2}}+{{\left( r-1 \right)}^{2}}={{r}^{2}}\] \[\Rightarrow \]\[4+{{r}^{2}}-2r+1={{r}^{2}}\] \[\Rightarrow \]\[4+{{r}^{2}}-2r+1={{r}^{2}}\]\[\Rightarrow \]\[r={}^{5}/{}_{2}\]\[\Rightarrow \]You need to login to perform this action.
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