The gift box has a rectangular shape with dimensions of 8×8×3 cm. Miloslav wants to cover it with square paper with sides of 18 cm. How much paper left him?

Correct answer:

x =  100 cm2

Step-by-step explanation:

d=18 cm S1=d d=18 18=324 cm2  a=8 cm b=8 cm c=3 cm  S2=2 (a b+a c+b c)=2 (8 8+8 3+8 3)=224 cm2  x=S1S2=324224=100 cm2

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