Answer:
To do this you need to understand Surface Area!
Step-by-step explanation:
Surface Area is just the areas of the faces that make up a 3D figure. So we can just use area of the faces, add them all together, and multiply by two(there are two identical faces on each side).
Thus,
[tex]A_{Face 1}=20*10=200[/tex]
[tex]A_{Face2} =20*3=60[/tex]
[tex]A_{Face3}=10*3=30[/tex]
As such, take the sum and double it!
[tex]SA=(200+60+30)*2=(290)*2=580cm^{2}[/tex]
So, there you go!
P.S. I did not come here for the promise of a brainliest, I just came here because the explanation was bad on the other answer. Stay Safe!
