Question

area of two circle are in the ratio 16:49....... calculate the ratio of their circumferences

Answer 1

Answer:

4 : 7

Explanation:

$\pi r^{2} \div \pi \: r {}^{2} = 16 \div 49 \\ {r}^{2} \div {r}^{2} = 16 \div 49 \\ r \div r = 4 \div 7$

hope it helps..

Answer 2

Answer:

brainliest!!!!

Explanation:

A = π r²                                 C = 2πr

A α r²                                    C α r

A₁ : A₂ = 16 : 49

r₁² : r₂² = 16 : 4

r₁ : r₂ = 4 : 7                            

                                              C₁ : C₂ = r₁ : r₂

                                                          = 4 : 7