# Why is the volume of a sphere 4 3?

The volume of a sphere is 4 3 because that is the amount of space that the sphere takes up. The formula for the volume of a sphere is V = 4/3πr³. This means that the volume is equal to four-thirds times pi times r cubed.

## The mathematical formula for the volume of a sphere

As the surface area of a sphere is 4pir^2, the formula for the volume of a sphere is (4/3)pir^3.

## How this formula is derived

This formula is derived from the equation for the volume of a cylinder. The volume of a cylinder is equal to the product of its height and the area of its base. If we take a slice through the center of the cylinder, we can see that it is composed of two cones with bases that are equal to the circles at the top and bottom of the cylinder, and a rectanguar prism in between them:

The volume of a cone is equal to one-third of the product of its height and the area of its base. So, taking this into account, we can see that the volume of our slice through the cylinder is equal to:

Now, if we take an infinite number of these slices, each one getting thinner and thinner, we can approximate the volume of the entire cylinder by summing up all those volumes. This process is called integration, and it results in the following formula for the volume of a cylinder:

We can use a similar process to derive a formula for the volume of a sphere. A sphere can be thought of as being made up of an infinite number cylinders with bases that are parallel to each other. If we take a slice through one such cylinder, we get a shape that looks like this:

The volumeof this slice is given by:

where r is the radiusof the sphere (and alsothe radiusof the cylinder). Now, if we take an infinite numberof these slices and sum up their volumes,

## Why the volume of a sphere is 4 3

When one looks at the proof for why the volume of a sphere is 4/3pi, it seems fairly intuitive. However, when you think about it, there are a few things that aren’t so obvious. Let’s break it down:

First, we have to think about what a sphere actually is. A sphere is a three-dimensional object that is completely symmetrical. It’s like a circle, but in three dimensions. This means that if you cut a sphere in half, you would end up with two perfect halves.

Next, we need to think about how to calculate the volume of a three-dimensional object. The volume of any object is calculated by multiplying its length by its width by its height. However, because a sphere is symmetrical, its length and width are equal. This means that we can simplify the formula to just length x height.

Now that we know how to calculate the volume of a sphere, we can plug in some numbers. The radius of a sphere is the distance from its center to its edge. If we plug in r = 1 for our radius, then our equation becomes: V = 4/3pi x 1 x 1 x 1

This gives us a final answer of 4/3pi for the volume of a sphere.

## The significance of the number 4 3

There are many interesting things about the number 4 3 that make it significant. For one, it is the only number that is both a square and a cube. This means that it can be used to represent both two-dimensional and three-dimensional space. It also has a very symmetrical structure, which makes it visually pleasing and easy to work with.

Another significant thing about 4 3 is that it is the first perfect number. A perfect number is a positive integer that is equal to the sum of its proper divisors. The proper divisors of 4 3 are 1, 3, and 9, so 4 3 = 1 + 3 + 9. As you can see, this makes it a very special number indeed!

Finally, the number 4 3 also has a lot of historical significance. It was first mentioned by Euclid in his Elements, and has been studied by many mathematicians since then. In fact, there is even an entire branch of mathematics devoted to its study!

## Other interesting facts about spheres

There are a few other interesting facts about spheres that are worth mentioning. For example, the surface area of a sphere is 4πr². So, if you have a sphere with a radius of 10 cm, the surface area would be 1,256 cm².

Another interesting fact is that the volume of a sphere is (4/3)πr³. So, using the same sphere with a radius of 10 cm, the volume would be 4,189 cc or 4.19 L.

Finally, it’s worth noting that the average density of a sphere is its mass divided by its volume. This means that if you have two spheres of different sizes but with the same mass, the smaller sphere will have a higher density than the larger one.