Concrete hatch

The concrete hatch for a round well has a diameter of 1300 mm and a thickness of 80 mm. Determine its weight in kg if the density of the concrete is 2545 kg/m3

Correct result:

m =  270.2429 kg

Solution:

D=1300 mm m=1300/1000  m=1.3 m h=80 mm m=80/1000  m=0.08 m ρ=2545 kg/m3  r=D/2=1.3/2=1320=0.65 m S=π r2=3.1416 0.6521.3273 m2 V=S h=1.3273 0.080.1062 m3  m=ρ V=2545 0.1062=270.2429 kg



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