Brass ball

What is the weight of a hollow brass ball, the outer diameter of which is 16 cm and the wall thickness is 2 cm, while the density of brass is ϱ = 8.5 g

Correct answer:

m =  10.539 kg

Step-by-step explanation:

D=16 cm R=D/2=16/2=8 cm h=2 cm r=Rh=82=6 cm  ρ=8.5 g/cm3  V1=34 π R3=34 3.1416 832144.6606 cm3 V2=34 π r3=34 3.1416 63904.7787 cm3  V=V1V2=2144.6606904.77871239.8819 cm3  m1=ρ V=8.5 1239.881910538.9962 g  m=m1 kg=m1:1000  kg=10538.9962:1000  kg=10.539 kg=10.539 kg

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