Surface area of a cylinder

Answer Key - Grade 7 Math Worksheet - Building Confidence

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

1. 1.

   Ari's can opens out into two circles and a rectangle. Each circle is 12.56 square cm, and the rectangle is 75.36 square cm. What is the surface area in square cm?

   100.48
2. 2.

   Bo's jar opens out into two circles and a rectangle. It is spotless. Each circle is 28.26 square cm, and the rectangle is 150.72 square cm. What is the surface area in square cm?

   207.24
3. 3.

   Esme's candle opens out into two circles and a rectangle. Each circle is 12.56 square cm, and the rectangle is 175.84 square cm. What is the surface area in square cm?

   200.96
4. 4.

   Luz's can has a radius of 2 cm. Its side unrolls into a rectangle 12.56 cm wide, the distance around, and 5 cm tall. What is the area of the side in square cm?

   62.8
5. 5.

   Milo's jar has a radius of 3 cm. Its side unrolls into a rectangle 18.84 cm wide, the distance around, and 8 cm tall. What is the area of the side in square cm?

   150.72
6. 6.

   Noah's drum has a radius of 4 cm. Its side unrolls into a rectangle 25.12 cm wide, the distance around, and 10 cm tall. What is the area of the side in square cm?

   251.2
7. 7.

   Pia's candle has a radius of 5 cm. Its side unrolls into a rectangle 31.4 cm wide, the distance around, and 11 cm tall. What is the area of the side in square cm?

   345.4
8. 8.

   Zee's jar has two flat ends, each a circle with a radius of 4 cm. What is the area of both ends together in square cm? Use π = 3.14. Do not round.

   100.48
9. 9.

   Ari's drum has two flat ends, each a circle with a radius of 5 cm. What is the area of both ends together in square cm? Use π = 3.14. Do not round.

   157
10. 10.

    Bo's candle has two flat ends, each a circle with a radius of 6 cm. What is the area of both ends together in square cm? Use π = 3.14. Do not round.

    226.08