Difference 64924

We get a block if we stack two cubes with an edge of 1dm. What is the difference between the surfaces of this block and the cube?

Correct answer:

x =  4 dm2

Step-by-step explanation:

a=1 dm b=a=1 dm c=2 a=2 1=2 dm  S1=6 a2=6 12=6 dm2 S2=2 (a b+b c+c a)=2 (1 1+1 2+2 1)=10 dm2  x=S2S1=106=4 dm2

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