A) \[\pi :1\]
B) \[1:\pi \]
C) \[\pi :3\]
D) \[3:\pi \]
Correct Answer: A
Solution :
(a): \[r\to r+1:C=d\pi \Rightarrow :\]now \[{{C}_{1}}=\pi (d+2)\] Common sense logic: Ratio of circumference and diameter is always \[n:1,\]whether we increase radius by 1 unit or 10 units or 100 units.
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