Surface area of prisms and cylinders: problems

Answer Key - Grade 8 Math Worksheet - Challenge Me

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

1. 1.

   Jun used 252 square cm of cardboard for a shipping box, all six faces. The base is 12 cm by 6 cm. How tall is the box, in cm?

   3
2. 2.

   Kira used 176 square inches of cardboard for a tall gift box, all six faces. The base is 4 inches by 4 inches. How tall is the box, in inches?

   9
3. 3.

   Luz used 700 square cm of cardboard for a storage box, all six faces. The base is 10 cm by 15 cm. How tall is the box, in cm?

   8
4. 4.

   Milo used 550 square cm of cardboard for a cardboard pencil box, all six faces. The base is 20 cm by 5 cm. How tall is the box, in cm?

   7
6. 5.

   Noah paints all six faces of a toy block, a cube, and covers 216 square cm. How long is each edge, in cm?

   6
7. 6.

   Pia paints all six faces of a cube-shaped box, a cube, and covers 384 square inches. How long is each edge, in inches?

   Use the picture in question 5.

   8
8. 7.

   Ren paints all six faces of a cube-shaped gift box, a cube, and covers 600 square cm. How long is each edge, in cm?

   Use the picture in question 5.

   10
9. 8.

   Ari's short pillar candle has a curved side of 125.6 square cm and a height of 4 cm. What is its total surface area, in square cm? Use π = 3.14. Do not round.

   282.6
10. 9.

    Bo's thin candle has a curved side of 150.72 square cm and a height of 12 cm. What is its total surface area, in square cm? Use π = 3.14. Do not round.

    175.84
11. 10.

    Esme's toy drum has a curved side of 351.68 square cm and a height of 8 cm. What is its total surface area, in square cm? Use π = 3.14. Do not round.

    659.4