Question

the areas of two concentric circles are 16 π cm² and 9π cm². Therefore the sum of their radii is____cm. (2,3,4,7)​

Answer 1

Answer:

7

Step-by-step explanation:

this is because 16 is 4 and 9 is 3

therefore 4+3 =7 answer

Answer 2

area of 1st circle=16||cm^2

$\pi {r}^{2} = 16\pi \\ {r}^{2} = 16 \\ r = 4$

And similarly

r=3cm

so,as it is concentric circles

so the sum of radius is 4+3=7cm(ans)

HOPE IT IS HELPFUL......:)☆