Respuesta :

SA = (12 x 5 x 2) + (20 x 5 x 2) + (12 x 20) + (0.5 x 12 x 9 x 2) + (20 x 11 x 2)

SA = 120 + 200 + 240 + 108 + 440

SA = 1,108 in²

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