Calculate 8891

Calculate the weight of a PVC pipe with an inner diameter d = 45 mm and a length l = 3 m if the wall thickness of the pipe is s = 7.5 mm. The density of PVC is ρ = 1350 kg/m3.

Correct answer:

m =  5.0099 g

Step-by-step explanation:

d=45 mm m=45:1000  m=0.045 m s=7.5 mm m=7.5:1000  m=0.0075 m  ρ=1350 kg/m3  l=3 m  r1=d/2=0.045/2=4009=0.0225 m r2=r1+s=0.0225+0.0075=1003=0.03 m  S=π r22π r12=3.1416 0.0323.1416 0.022520.0012 m2  V=S l=0.0012 30.0037 m3  m=V ρ=0.0037 1350=5.0099 g

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