Question

I need to know if it’s A B C Or D

Answer 1

Given:

`d_1=1,d_2=2r`

The circumference of the circle is given as,

`C=2\pi r`

For the circle B, the circumference is given as,

`\begin{gathered} C_B=\pi\cdot d_2_{}=2\pi r \\ It\text{ can also be written as,} \\ (1)/(2r)=(\pi)/(C_B) \end{gathered}`

Answer: option a)