The body

The body on the figure consists of cubes with an edge length 10 cm. What surface has this body?

Correct result:

S =  8800 cm2

Solution:

a=10 cm S1=a2=102=100 cm2  x=2⋅ 8+3⋅ 3+4=29 y=2⋅ 4+2⋅ 5+2⋅ 4+2⋅ 15+3=59  S=S1⋅ (x+y)=100⋅ (29+59)=8800 cm2

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