Volume of cones and spheres

Answer Key - Grade 8 Math Worksheet

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

1. 1.

   Jun's toy volcano is a cone with a radius of 4 cm and a height of 15 cm. What is its volume in cubic cm? Use π = 3.14. Do not round.

   251.2
2. 2.

   Luz's castle roof is a cone 6 cm across and 4 cm tall. What is its volume in terms of π? Write it like 14π.

   12π
3. 3.

   Milo's toy volcano is a cone 12 cm across and 5 cm tall. What is its volume in terms of π? Write it like 14π.

   60π
4. 4.

   Noah's turret roof is a cone 10 cm across and 9 cm tall. What is its volume in terms of π? Write it like 14π.

   75π
5. 5.

   Pia's ball has a radius of 7.5 cm. What is its volume in cubic cm? Use π = 3.14. Do not round.

   1766.25
6. 6.

   Ren's basketball has a radius of 12 cm. What is its volume in cubic cm? Use π = 3.14. Do not round.

   7234.56
7. 7.

   Tala's play ball has a radius of 10.5 cm. What is its volume in cubic cm? Use π = 3.14. Do not round.

   4846.59
8. 8.

   Zee's ball is 6 cm across. What is its volume in terms of π? Write it like 14π.

   36π
9. 9.

   Esme's toy volcano is a cone with a radius of 3 cm and a volume of 141.3 cubic cm. How tall is it, in cm? Use π = 3.14.

   15
10. 10.

    Kira's soil pile is a cone with a radius of 5 ft and a volume of 157 cubic ft. How tall is it, in ft? Use π = 3.14.

    6