Question

L=8cm
l=20cm
h=2m
m=8t
ro=?
​

Answer 1

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

Answer 2

 

$\displaystyle\bf\\L=8cm=0,08m\\l=20cm=0,2m\\h=2m\\m=8t\\ro=?\\\\Rezolvare:\\\\V=L\times l\times h = 0,08\times0,2\times2=0,032~m^3\\\\\rho=\frac{m}{V}=\frac{8~t}{0,032~m^3}=\boxed{\bf250~t/m^3}$

 

Consider ca densitatea obtinuta e prea mare.