Question

A gift box in the shape of a rectangular prism has 20-inch length, 14-inch width, and 10-inch height. How much paper will you need to wrap the gift box?

Answer 1

• L=20
• B=14
• H=10

So

TSA

• 2(LB+BH+LH)
• 2(20×14+14×10+10×20)
• 2(280+140+200)
• 2(620)
• 1240in²

Answer 2

• 1240 in²

Explanation:

Total surface area:

• S = 2(lw + lh + wh)
• S = 2(20*14+20*10+14*10) = 1240 in²