Calculate 32713

Hello, I want to ask about the solution and procedure for my task, which is a cuboid with sides a=5cm, b=4 cm, and c=10 cm.
Calculate the area of the blue wall.
Calculate the area of the yellow wall.
Calculate the area of the green wall.
Calculate the surface area of ​​the cuboid.

Correct answer:

S₁ =  20 cm²
S₂ =  40 cm²
S₃ =  50 cm²
S =  220 cm²

Step-by-step explanation:

$$\begin{gathered} a=5\text{cm} \\ b=4\text{cm} \\ c=10\text{cm} \\ {S}_1=a\cdot b=5\cdot 4=20{\text{cm}}^2 \end{gathered}$$

$S_2=b\cdot c=4\cdot 10=40{\text{cm}}^2$

$S_3=a\cdot c=5\cdot 10=50{\text{cm}}^2$

$S=2\cdot (S_1+S_2+S_3)=2\cdot (20+40+50)=220{\text{cm}}^2$

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