Explicație:
ro=m÷v
v=h×s
s=arie=l×L=8×20=160 cm pătrați =0,016m patrati
v=2×0,016=0,032m cubi
8t=8000kg
ro=8000÷0,032=250.000
[tex]\displaystyle\bf\\L=8cm=0,08m\\l=20cm=0,2m\\h=2m\\m=8t\\ro=?\\\\Rezolvare:\\\\V=L\times l\times h = 0,08\times0,2\times2=0,032~m^3\\\\\rho=\frac{m}{V}=\frac{8~t}{0,032~m^3}=\boxed{\bf250~t/m^3}[/tex]
Consider ca densitatea obtinuta e prea mare.
