[tex]L=60dm=6m [/tex]
[tex]l=200cm=2m [/tex]
[tex]l_{gresie}= 40cm =0.4m [/tex]
[tex]A_{incapere}= L*l = 6m *2m= 12 m^2 [/tex]
[tex]A_{gresie}=l_{gresie}^2=(0.4m)^2=0.16m^2 [/tex]
[tex]placi.necesare = \frac{A_{incapere}}{A_{gresie}} =\frac{12 m^2}{0.16 m^2} = 75 [/tex]
[tex]cost.placi = 12*2.45 lei = 29.4 lei [/tex]
[tex]cost.materiale = \frac{29.4 lei}{2} = 14.7 lei [/tex]
[tex]cost.total = cost.placi + cost.materiale = 29.4 lei + 14.7 lei = 44.1 lei [/tex]
