Question

find the Total surface area and Lateral surface area of a cuboid with length = 3.5m breadth = 32dm and height = 260cm. Please solve this problem. The answer of the question is TSA = 348.4, LSA = 348.4

Answer 1

L. S. A
$tsa = 2(lb + bh+ hl + ) \\ = 2(35 \times 32 + 32 \times 26 + 26 \times 35) \\ = 2(1120 + 832 + 910) \\ = 2 \times 2862 \\ = 3694dm = 394.4 \: {m}^{2} \\ \\ \\ \\ lsa = 2h(l + b) \\ = 2 \times 2.6(3.5 + 3.2) \\ = 5.2 \times 6.7 \\ = 34.84 {m}^{2}$




1 dm =10cm,

1m=10dm,

1 m = 100 cm

Answer 2

Hello,
we have that:
a= 3.5m ;
b=32 dm=3.2 m;
h=260 cm= 2.6 m

we calculate  the total area of ​​the cuboid:
Atot=2(ab+ah+bh)=2×(3.5×3.2+3.5×2.6+3.2×2.6)
       =2×(11.2+9.1+8.32)=2×28.62=57.64 m² or 

we calculate the lateral area of the cuboid:
Al=2(ah+bh)=2×(3.5×2.6+3.2×2.6)
    =2×(9.1+8.32)=2×17.42=34.84 m²

bye :-)