Metal tube

Calculate the metal tube mass 8 dm long with the outer radius of 5cm and the inner radius of 4.5cm, and 1cm3 of this metal is 9.5g.

Correct answer:

m =  11.3411 kg

Step-by-step explanation:

r1=4.5 cm r2=5 cm l=8 dm cm=8 10  cm=80 cm  S=π r22π r12=3.1416 523.1416 4.5214.9226 cm2  V=S l=14.9226 801193.8052 cm3  r=9.5 g/cm3 m1=r V=9.5 1193.805211341.1495 g  m=m1 kg=m1:1000  kg=11341.1495:1000  kg=11.341 kg=11.3411 kg

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