To find the surface area of the door stopper, we need to calculate the area of each of its sides and then add them up.
The surface area of the first side (15.9 by 16.7) = 15.9 * 16.7 = 265.53 square centimeters
The surface area of the second side (15.9 by 8.9) = 15.9 * 8.9 = 141.51 square centimeters
The surface area of the third side (16.7 by 8.9) = 16.7 * 8.9 = 148.63 square centimeters
Total surface area = 265.53 + 141.51 + 148.63 = 555.67 square centimeters
Now we need to calculate how many packages of stickers are needed:
555.67 square centimeters / 75 square centimeters per package = 7.42 packages
Since stickers can only be purchased in whole packs, you will need 7 packages of stickers.
one of the triangle sides is 15.9
the other is 16.7
the base is 8.9 by 5
A wooden door stopper needs to be covered with stickers to match the door for a directing contest. If one package of stickers covers a surface area of 75 square centimeters, how many packages of stickers need to be purchased? (Find the closest number to the surface area of the door stopper. Stickers may only be purchase in whole packs.)
(1 point)
• You will need 6 packages of stickers.
• You will need 5.5 packages of stickers.
• You will need 414.14 cm? packages of stickers.
• You will need 7 packages of stickers.
1 answer