Respuesta :

Answer:

282.7

Step-by-step explanation:

surface area of cylinder = 2πR² + 2πRh

R = 3 cm

h = 12 cm

surface area of cylinder = 2π*3² + 2π*3*12 = 90π ≈ 90*3.14 ≈ 282.7 (cm²)

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