Antunes
1 - 8-5,5=2,5 A=? A retangulo =8x3,5=28 ∏x2,5,5₂/2=9,82 A total =28+9,82=37,82m² 2 - V retangulo =3,5x5,5x2,5=48,13m₃ V quadrado =3,5³=42,88m ₃ V total =48,13+42,88=91,01m ₃ 3 - 8x3,5x6=168 000L 168 000x0,13=21 840 4 - 50=91,01/x x=91,01/50 x= 18202 18202/60=303,37 horas