Question

Calculati aria totala, aria laterala si volumul unui paralelipiped dreptunghic stiind ca
L=6
l=2
h=4

Answer 1

At=2(Lh+lh+Ll)   - aria totala
At=2(24+8+12)
At=2×44
At=88

Al=2(Lh+lh)   -aria laterala
Al=2(24+8)
Al=2×32
Al=64

V=L×l×h   - volumul
V=6×2×4
V=48

Answer 2

$A _{laterala} =P _{bazei} *h \\ \\ P _{bazei} =2(L+l) \\ \\ P _{bazei} =2(6+2)=2*8=16 \\ \\ A _{laterala} =16*4=64 \\ \\ A _{totala} =A _{laterala} +2A _{bazei} \\ \\ A _{bazei} =L*l \\ \\ A _{bazei} =6*2=12 \\ \\ A _{totala} =64+2*12 \\ \\ A _{totala} =64+24=88 \\ \\ V=A _{bazei} *h \\ \\ V=12*4=48$