Question

i) The ratio of circumference and area of a circle 2:7. What is its circumference?​

Answer 1

Answer:

2:7

Step-by-step explanation:

2πr=2/7

2x22/7xrxr=2/7

rxr=1/22

now using the circumference formula

2πr=0

2*22/7*1/22=2/7

=2:7

Answer 2

$\frac{2\pi \: r}{\pi \: r {}^{2} } = \frac{7}{2}$

$\frac{2}{r} = \frac{7}{2}$

r=4/7

circumference of circle=2πr

put the radius in this formula

you will get the answer