Respuesta :

MuridCikgu

Known :

Sa = 1017.36 yd²

Asked :

r = ...?

Answer :

Sa = 4πr²

1017.36 = 4 × 3.14 × r²

1017.36 = 12.56 r²

r² = 1017.36 ÷ 12.56

r² = 81

r = √81

r = 9 yd

So, the radius is 9 yd (D)

Hope it helpful and useful :)

TheLazyNobita

Answer:

9 yd

Step-by-step explanation:

SA = 4 pi r²

1017.36 = 4 × 22/7 × r²

r² = 1017.36 × 7/88

r = 9 yd