Oblicz gęstość 3 walców o wymiarach h= 6 cm
2r = 2 cm
m1 = 146 g
m2 = 51 g
m3 = 14 g
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d= 2cm czyli r = 2/2 to r=1 cm
V=IIr^2*h
II = 3,14
V=6IIcm^3 = 18,84cm^3
gęstość = masa / objętość
1. q=146/18,84=7,75 g/cm^3
2. q=51/18,84=2,71 g/cm^3
3. q=14/18,84 =0,74 g/cm^3