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q = m/v
m=160kg
v=2m³
q=160:2
q=80kg/m³
zad.2.
m=83,98
kr.=2dm
v=0,2*0,2*0,2=0.008m³
0,008*125=1m³
83,98*125=10497,5kg
10497,5kg/m³ - srebro
zad.3.
v=2dm³=0,002 m3
q=920kg/m³
m=?
q=m/v /*v
vq=m
m=0,002*920=1,84kg
zad.4.
m=0,2kg
q=8440kg/m³
v=?
q=m/v /*v
qv=m /:q
v=m/q
v=0,2:8440
v≈2,3697m³