Volume of cones and spheres

Answer Key - Grade 8 Math Worksheet

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

1. 1.

   Esme's castle roof is a cone with a radius of 3 cm and a height of 10 cm. What is its volume in cubic cm? Use π = 3.14. Do not round.

   94.2
2. 2.

   Kira's turret roof is a cone with a radius of 6 cm and a height of 10 cm. What is its volume in cubic cm? Use π = 3.14. Do not round.

   376.8
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.

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

   36π
7. 7.

   Bo's snowman head is 18 cm across. What is its volume in terms of π? Write it like 14π.

   972π
8. 8.

   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
9. 9.

   Jun's castle roof is a cone with a radius of 2 cm and a volume of 62.8 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