Present

A gift box has the shape of a cuboid with dimensions 8 × 8 × 3 cm. Miloslav wants to wrap it using square sheets of paper with sides of 18 cm. How much paper is left over?

Final Answer:

x =  100 cm²

Step-by-step explanation:

$$\begin{gathered} d=18\text{cm} \\ {S}_1=d\cdot d=18\cdot 18=324{\text{cm}}^2 \\ a=8\text{cm} \\ b=8\text{cm} \\ c=3\text{cm} \\ {S}_2=2\cdot (a\cdot b+a\cdot c+b\cdot c)=2\cdot (8\cdot 8+8\cdot 3+8\cdot 3)=224{\text{cm}}^2 \\ x=S_1-S_2=324-224=100{\text{cm}}^2 \end{gathered}$$

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