A wooden doorstop needs to be covered with stickers to match the door for directing contest. If one package of stickers covers a surface area of 75 cm² how many packages of stickers need to be purchased find the closest number to the surface area of the doorstop stickers may only be purchased in whole packs

1 answer

To determine the surface area of the wooden doorstop, we need to know the dimensions of the doorstop.

Let's say that the wooden doorstop has dimensions of 10 cm in width, 15 cm in height, and 2 cm in depth.

The total surface area of the doorstop can be calculated using the formula:

Surface Area = 2lw + 2lh + 2wh
= 2(10*15) + 2(10*2) + 2(15*2)
= 300 + 40 + 60
= 400 cm²

Since one package of stickers covers 75 cm², we need to divide the total surface area of the doorstop by the surface area covered by one pack of stickers to determine the number of packages needed.

Number of packages = 400 cm² / 75 cm²
≈ 5.33

Since we can only purchase whole packs of stickers, we need to round up to the nearest whole number. Therefore, approximately 6 packages of stickers need to be purchased to cover the wooden doorstop.