Finding the volume of a sphere (diameter given)

by Sabrina
(USA)

Question
Find the volume of the sphere where its diameter is 15 inches. Take π=3.14.


Answer
Now, let's take a look at the sphere below:

sphere with the diameter of 15 inches

Alright, since we are finding the volume of a sphere, we will be using the following volume formula:

the formula for the volume of a sphere

where π is a number that is approximately equals to 3.14 (or use the number given to you) and r is the radius of the sphere.

Note that, to use the formula, we need the value of the radius. Since the radius is half of the diameter, we can find the value of the radius by dividing 15 with 2. This is shown below:

the radius of the sphere is 7.5 inches
With the radius, r=7.5 inches, we can calculate for the volume of the sphere as shown below:

calculating the volume of the sphere
Now, it is important to include the unit. Since the radius is in inches. The volume will be in cubic inches. Therefore:
the volume is 1766.25 cubic inches



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Dec 01, 2016
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Expression NEW
by: Anonymous

Dont like much but its ok

May 04, 2016
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Spam NEW
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( ͡° ͜ʖ ͡°)

May 01, 2016
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Diameter of sphere NEW
by: Anonymous

Very helpful!!

Apr 20, 2016
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Amazing NEW
by: Anonymous

Amazing

Apr 20, 2016
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BAD NEW
by: Anonymous

Did not help at all. I expect better than that. More effort next time

Apr 01, 2016
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Too long ago NEW
by: jimbarry1946

I'm a retired math teacher, but it's been so many years since I used this I had forgotten the formula. I wanted to know how much the volume increased when the radius doubled. Now I know--it's eight times because the two is cubed. Thank you.

Your page appears as if it would be very helpful for young people.

Mar 01, 2015
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thanku it simple
by: Perabet

I understand clearly thanku

Jun 15, 2014
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fantastic
by: Anonymous

I am very pleace because it help me when i could not remember it.

Sep 04, 2011
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THANKS
by: Anonymous

That really helped me.

Aug 24, 2011
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Volume of Sphere, given Diameter
by: Ger

Volume of Sphere = 0.5235988 X D^3

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