Volume

The volume of an object is a measure of the amount of space that it occupies. Note that volume only applies to three-dimensional figures.

Finding Volume

This section covers the methods to find volumes of common Euclidean objects.

Prism

The volume of a prism is $Bh$ , where $B$ is the area of the base and $h$ is the height.

Pyramid

The volume of a pyramid is given by the formula $\frac13bh$ , where $b$ is the area of the base and $h$ is the height.

Sphere

The volume of a sphere is $\frac 43 r^3\pi$ , where $r$ is the radius of the sphere at its widest point.

Cylinder

The volume of a cylinder is $\pir^2h$ (Error compiling LaTeX. Unknown error_msg), where $h$ is the height $and$ r $is the radius of the base. ===Cone=== The volume of a cone is$ \frac 13\pir^2h $, where$ h $is the height and$ r$ is the radius of the base.

Problems

Introductory

Centers of adjacent faces of a unit cube are joined to form a regular octahedron. What is the volume of this octahedron? (Source)

Intermediate

A tripod has three legs each of length $5$ feet. When the tripod is set up, the angle between any pair of legs is equal to the angle between any other pair, and the top of the tripod is $4$ feet from the ground. In setting up the tripod, the lower 1 foot of one leg breaks off. Let $h$ be the height in feet of the top of the tripod from the ground when the broken tripod is set up. Then $h$ can be written in the form $\frac m{\sqrt{n}},$ where $m$ and $n$ are positive integers and $n$ is not divisible by the square of any prime. Find $\lfloor m+\sqrt{n}\rfloor.$ (The notation $\lfloor x\rfloor$ denotes the greatest integer that is less than or equal to $x.$ ) (Source)

Page

Toolbox

Search