The pipe

The pipe is 1.5 m long. Its outer diameter is 60 cm, inner diameter is 52 cm. Calculate the weight of the pipe if the density of the material from which it is made is 2 g/cm cubic. Round the result to kilograms.

Correct result:

m =  211 kg

Solution:

D1=60 cm D2=52 cm l=1.5 m cm=1.5 100  cm=150 cm ρ=2/1000=1500=0.002 kg/cm3  r1=D1/2=60/2=30 cm r2=D2/2=52/2=26 cm  S=π r12π r22=3.1416 3023.1416 262703.7168 cm2 V=S l=703.7168 150105557.5132 cm3 m=V ρ=105557.5132 0.002=211 kg



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