The Easy Formula for How to Find the Volume of a Cone

The Short Explanation for finding the Volume of a Cone

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How to use the Volume of a Cone Formula

This explanation is about how to find volume of a cone easily. Discovering Volume of a Cone can be solved effortlessly by using the equation and following right series of activities. The first step in discovering Volume of a Cone is understanding that you are multiplying the territory of the base by the height of the cone. The base happens to be a circle so you should utilize the Area of a Circle formula to figure the area of the base. Make certain to recall that the radius is equivalent to half of the diameter. When you know the area of the base, you should multiply it by the height of the cone. Next, you divide the result by three. The last step for discovering Volume of a Cone is to simplify using your calculator.

1. In order to solve for Volume of a Cone you must know that the volume is equal to the base times the height divided by three.
2. The base is equal to a circle so you use the area of a circle formula to find the area of the base.
3. The height is equal to how tall the cone is.
4. You substitute in the radius of the cone for r, and the height of the cone for h.
5. Multiple those together in your calculator.
6. Finally divide by three and be sure to use the correct units.

 

Volume of a Cone Practice Problems Quiz

Watch our video where we complete our Volume of a Cone Worksheet

Watch our free video on Formula for Volume of Cone. This video shows how to solve problems that are on our free Volume of a Cone worksheet that you can get by submitting your email above.

Watch the free formula of a cone video on YouTube here: How to Find the Volume of a Cone

Video Transcript:

This video is about how to find the volume of a cone and we are at our volume of cone worksheet in order to show you some example problems.

The first step in finding the volume of a cone is to figure out the cone volume formula. In order to figure out the volume of cone formula you have to use a formula that you should already know which is volume of a cylinder. We already know that volume of a cylinder is the area of the base times the height, and in the case of a cylinder and a cone the base is a circle.  We use PI R squared because that is how you find the area of a circle. This right here is how to find the volume of a cylinder. If we were to draw an imaginary cylinder around this cone it would look something like this. Our blue line is our imaginary cylinder you will notice that the cone takes up less space than the cylinder does. In order to compensate for that we have to change our volume of a cylinder formula and it just so happens that the volume of a cone is 1/3 that of a cylinder. So in order to change our formula from volume of a cylinder to volume of a cone you just divide by 3. Here’s our new formula just to reiterate because we know that the volume of a cone is 1/3 that of a cylinder, all you have to do is take the volume of a cylinder which is in red and divide it by 3 to compensate.

Let’s do our first problem here on the volume cone worksheet. We are at number one and we just went over our explanation on formula for volume of a cone and here it is. The volume of the cone is the area of the base times the height divided by 3, so in order to solve for the volume you have to substitute in for the radius and you have to substitute in for the height because those are the two pieces we need in our formula. When you look at our problem here our radius of our circle is 9 inches so that’s going to be nine and then the height of our cone is 17 inches so you’re gonna plug in 17 for height. Then we’ll take our radius which is nine and we will substitute it in for R and then we will also substitute in 17 for the height so that will go here and then the whole thing gets divided by three. Once you put that in your calculator you will get 14401.99 inches cubed because that’s our unit and that’s going to be our answer.

In our next example we have to find out how to find the volume of a cone that has a height of 19 and a diameter of 10. We know our formula for a cone is PI R squared times the height divided by 3 and we know that we have to find the radius and we know that we have to find the height. In order to do that the height is easiest because you can look at your cone and you can see that the height is 19 feet. We’re gonna put 19 feet here put 19 in for H and then when we do the radius what they give us is 10 feet but the 10 feet is for the whole diameter it’s the whole length of the circle. Instead of using diameter we have to use the radius which is half of the diameter so what we’re going to do is we’re gonna take our diameter divided by 2 10 divided by 2 is 5. We will use 5 for the radius and now we know our radius and we know our height. We’re gonna take our volume we’re gonna take our volume formula and substitute in radius and height  we know the radius is 5 that goes in for R and then we know the height is 19. That goes in for H and then we have to divide everything by 3. We’re going to take our formula we’re going to multiply all of this together then divide it by 3 and we will get four hundred ninety seven point four two and then our unit is feet cubed. Try all the practice problems on our volume of cones worksheet above.