Respuesta :

Answer is 35cm hope it will help you .

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EXPLAINATION: π.r² = 3850 cm²  

⇒ r² = 3850/π = 3850/3,14 ≈ 1225.5

⇒ r = √ 1225.5 ≈ 35 cm

P/s: π ≈ 3.14

ANSWER: r = 35 cm

Ok done. Thank to me :>