Answer:
380 square inches
Explanation:
Step 1
We find the Surface Area of the Rectangular Prism
The Rectangular Prism has the dimensions of Length × Width × Height = 8 inches by 9 inches by 10 inches
Surface Area of a Rectangular Prism = 2(WL+ HL + HW)
Where W = Width = 9 inches
L = Length = 8 inches
H = Height = 10 inches
Surface Area of the Rectangular Prism = 2(9 × 8 + 10 × 8 + 9 × 10)
= 2(72 + 80 + 90)
= 2(242)
= 484 square inches.
Step 2
Find the area of the Rectangular shaped wrapping paper
The wrapping paper has dimensions :
2 feet by 3 feet
We have to convert to inches first
1 foot = 12 inches
2 feet = 2 × 12 inches = 24 inches
3 feet = 3 × 12 inches = 36 inches
Area of the Rectangular shaped wrapping paper = Length × Width
= 24 inches × 36 inches
= 864 square inches
Step 3
We calculate the amount of square inches of wrapping paper left.
The Amount left over = Area of Rectangular wrapping paper - Area of Rectangular prism
= 864 square inches - 484 square inches
= 380 square inches.
Therefore, the square inches of wrapping paper left over is 380 square inches.