Identical 81642

What is the largest surface area of a square glued together from 12 identical cubes with an edge length of 1 cm?

Correct answer:

S =  50 cm2

Step-by-step explanation:

n=2 2 3=12  a=1 b=1 c=n=12  S1=2 (a b+b c+c a)=2 (1 1+1 12+12 1)=50 cm2  a2=2 b2=1 c2=n/2=12/2=6  S2=2 (a2 b2+b2 c2+c2 a2)=2 (2 1+1 6+6 2)=40 cm2  S=S1=50=50 cm2

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