Question

The outer surfaces of a box are covered with gold foil, except the bottom. The box measure 6 in. long, 4 in. wide, and 3 in. high. How much gold foil was used?

Answer 1

First calculate the surface area of the entire figure. You can then subtract the bottom.

Explanation:

S.A = `(6 xx 4 xx 2) + (4 xx 3 xx 2) + (6 xx 3 xx 2) - (6 xx 4)`

S.A = `48 + 24 + 36 - 24`

S.A = 84 inche`s^2`

84 square inches of gold foil was used to cover the box.

Practice exercises:

1. The following prism is a package of Toblerone chocolates. Assuming that the logo Toblerone is etched on `1/8` of the total surface area, find the surface area that the logo covers, rounded to the nearest hundredth
   

Good luck!