Question

can somebody please help me with this because i keep getting 15.3 and that is wrong Ratio of area of circle C to its radius is 12 times pi . Which is the circumference of the circle

Answer 1

\[A=\frac{\theta \times r^2}{2}\]
So for a whole circle
\[\theta=2 \pi\]

You say
\[A=12\pi r\]
So
\[12\pi r = \pi r^2\]
\[r=12\]
And circumference is given by
\[2 \pi r = 2 \pi \times 12 = 24 \pi\]

Answer 2

thnks