Antunes

1 -  8-5,5=2,5

A=?

Aretangulo=8x3,5=28

∏x2,5,5₂/2=9,82

Atotal=28+9,82=37,82m²

2 - Vretangulo=3,5x5,5x2,5=48,13m₃

     Vquadrado=3,5³=42,88m₃

Vtotal=48,13+42,88=91,01m₃

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