Answer:
486
Step-by-step explanation:
Hello!
To find the surface area of a cube we use the equation

S is the surface area
a is the side length
Put what we know into the equation

Solve
S = 6 * 81
S = 486
Hope this Helps!
Answer:
*insert answer*
Step-by-step explanation:
I dont know it but hey
:D
Answer:
30
Step-by-step explanation:
10 x 3 = 30