Question

The area of a circle is 3.14 square kilometres. What is the circle's diameter? Use 3.14 for ​pi

Answer 1

Answer:

your answer is 2 km. circle's diameter

Answer 2

Question:

The area of a circle is 3.14 square kilometres. What is the circle's diameter?

To find:

To find the diameter of the circle.

Answer:

$\underline{\: \underline{\:\sf\red{Diameter \: of\:the\: circle\:is \: 2 km}\:}\:}$

Given:

The area of a circle = 3.14 km² .

Step-by-step explanation:

$\boxed{Area \: of \: circle = {\pi r}^{2} }$

We know that,

$\pi = 3.14$

$Area \: of \: circle = 3.14 {km}^{2}$

$\implies 3.14 = 3.14 \times {r}^{2}$

$\implies {r}^{2} = 1$

$\implies r = 1$

$\longrightarrow \underline{\:\underline{\:Diameter(d) = 2r\:}\:}$

$\longrightarrow Diameter(d) = 2(1)$

$\longrightarrow \sf\pink{\boxed{Diameter(d) = 2 }}$

∴ Diameter of the circle is 2 km .