Math, asked by Anonymous, 6 months ago

Find the radius and circumference of the circular disc whose area is 314 cm2

Answers

Answered by mukeshkumar630464732
2

Answer:

radius = 55.69cm

Step-by-step explanation:

circumference= 350.05cm

Answered by OfficialPk
18

 \: \: \boxed{\boxed{\rm{\mapsto \: \: \: Firstly \: let's \: Understand}}}

\mathsf\red{●} \mathsf\green{Area \: of \: circle \: = \: π {r}^{2}}

\mathsf\red{●} \mathsf\green{π \: = \: \frac{22}{7} \: (or) \: 3.14}

\mathsf\red{●} \mathsf\green{Circumference \: of \: circle \: = \: 2πr}

\underline\mathcal{Answer} \mathcal{:-}

\mathsf\blue{Given}

\mathsf\blue{Area \: = \: 314 {cm}^{2}}

\mathsf\blue{π {r}^{2} \: = \: 314}

\mathsf\blue{\frac{22}{7} {r}^{2} \: = \: 314}

\mathsf\blue{22 \times {r}^{2} \: = \: 314 \times 7}

\mathsf\blue{{r}^{2} \: = \: \frac{2198}{22}}

\mathsf\blue{{r}^{2} \: = \: 99.9(≈100)}

\mathsf\blue{r \: = \sqrt{100}}

\mathsf\red{●} \mathsf\blue{\therefore \: r = 10 \: cm}

\mathsf\green{Circumference \: of \: circle \: = \: 2πr}

\mathsf\blue{==>  2 \times 3.14 \times 10}

\mathsf\red{●} \mathsf\blue{Circumference \: of \: circle \: = \: 62.8 \: cm}

\huge{\sf{\fcolorbox{black}{lightgreen}{Mark \: me \: as \: brainlist}}}

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