Back to Exercise: Know the formulas for the volumes of cones, cylinders, and spheres

Exercises: Volume Formulas for Cylinders, Cones, and Spheres

Work through each section in order. Use the formulas V=πr2hV = \pi r^2 h (cylinder), V=13πr2hV = \frac{1}{3}\pi r^2 h (cone), and V=43πr3V = \frac{4}{3}\pi r^3 (sphere). Leave answers in terms of π\pi unless a problem asks for a decimal (use π3.14\pi \approx 3.14). Always check whether you are given the radius or the diameter.

Grade 8·22 problems·~35 min·Common Core Math - Grade 8·container·8-g-c-9
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A

Recall / Warm-Up

1.

What is the area of a circle with radius rr?

2.

A rectangular prism has a base area of 1212 square cm and a height of 55 cm. Its volume equals base area times height. What is its volume, in cubic cm?

3.

What is the value of 434^3?

B

Fluency Practice

A vertical cylinder with radius labeled 3 and height labeled 7.
1.

Find the volume of the cylinder shown. Leave your answer in terms of π\pi (for example, 63π63\pi).

2.

A cylinder has diameter 1010 cm and height 44 cm. What is its volume?

A cone with base radius labeled 5 and height labeled 12.
3.

Find the volume of the cone shown. Leave your answer in terms of π\pi.

A sphere with radius labeled 3.
4.

Find the volume of the sphere shown. Leave your answer in terms of π\pi.

A sphere with radius labeled 2.
5.

A sphere has radius 22 cm. What is its volume?

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