Question

Area of a circle is 4ncm?, find the circumference of the circle (a) a cm (b) 27 cm (c) 3л cm (d) 47 cm​

Answer 1

Answer:

$Circumference=4\pi cm$

Step-by-step explanation:

$Area = 4\pi cm^2\\Area = \pi r^2 \\4\pi cm^2 = \pi *r*r\\4 cm^2 = r^2\\\sqrt{4} =\sqrt{r^2}\\2=r\\r=2\\Circumference = 2 \pi r\\Circumference = 2*\pi *2$