Surface area of prisms and cylinders: problems

Answer Key - Grade 8 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Jun wraps paper around only the four sides of a storage box. Its base perimeter is 26 inches, and it is 5 inches tall. What is the lateral area, in square inches?

   130
2. 2.

   Kira wraps paper around only the four sides of a lunch box. Its base perimeter is 20 cm, and it is 8 cm tall. What is the lateral area, in square cm?

   160
3. 3.

   Milo's tent is a triangular prism 6 feet long, and its end has a perimeter of 30 feet. What is the lateral area of its three sides, in square feet?

   180
4. 4.

   Noah measures a shoe box. Its sides have a lateral area of 84 square inches, and each of its two bases is 18 square inches. What is its total surface area, in square inches?

   120
5. 5.

   Net, not to scale. Pia measures a soup can. Its sides have a lateral area of 125.6 square cm, and each of its two bases is 28.26 square cm. What is its total surface area, in square cm?

   182.12
6. 6.

   Ren measures a toy cheese wedge. Its sides have a lateral area of 168 square cm, and each of its two bases is 24 square cm. What is its total surface area, in square cm?

   216
7. 7.

   Tala measures a pillar candle. Its sides have a lateral area of 94.2 square cm, and each of its two bases is 28.26 square cm. What is its total surface area, in square cm?

   150.72
8. 8.

   Ari covers every face of a small wooden block, a cube with edges of 2.5 inches. Each face is a square, 2.5 by 2.5. What is its total surface area, in square inches?

   37.5
9. 9.

   Bo covers every face of a cube-shaped box, a cube with edges of 9 cm. Each face is a square, 9 by 9. What is its total surface area, in square cm?

   486
10. 10.

    Esme covers every face of a cube-shaped gift box, a cube with edges of 11 cm. Each face is a square, 11 by 11. What is its total surface area, in square cm?

    726