Prescribed 4579

The racing ball for men has a prescribed weight of 7250g. It is made of iron. How does its diameter change if we make it from lead? The density of iron is 7.8 g / cm cubic, and the density of lead is 11.3 t / m cubic.

Correct answer:

D1 =  12.1083 cm
D2 =  10.7009 cm

Step-by-step explanation:

m=7250 g ρ1=7.8 g/cm3 ρ2=11.3 g/cm3  V1=m/ρ1=7250/7.8=3936250929.4872 cm3  V = 4/3 π r3 = 4/3 π (D/2)3  = π/6 D3 D1=36 V1/π=36 929.4872/3.1416=12.1083 cm
V2=m/ρ2=7250/11.3641.5929 cm3 D2=36 V2/π=36 641.5929/3.1416=10.7009 cm



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