find the weight of a lead pipe 3.5m long, if the external diameter of the pipe is 2.4cm and the thickness of the lead is 2mm and 1cubic cm of lead weight 10g.
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height=3.5m=350cm
external radius=R=1.2cm
thickness=2 mm=0.2cm
internal radius=r=(1.2-0.2)cm
r=1cm
volume=pi*h*(R-r)(R+r)=v
v=3.14*350*(1.2-0.2)(1.2+0.2)
v=483.56cm^3
weight=v*10
weight=486.56*10
weight=4865.6g
weight=4.8656kg
external radius=R=1.2cm
thickness=2 mm=0.2cm
internal radius=r=(1.2-0.2)cm
r=1cm
volume=pi*h*(R-r)(R+r)=v
v=3.14*350*(1.2-0.2)(1.2+0.2)
v=483.56cm^3
weight=v*10
weight=486.56*10
weight=4865.6g
weight=4.8656kg
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