A) \[55\,m\]
B) \[110\,m\]
C) \[220\text{ }m\]
D) \[~230\text{ }m\]
Correct Answer: C
Solution :
Let radius of inner and outer circle be \[{{r}_{1}}\] and \[{{r}_{2}}\]respectively.You need to login to perform this action.
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