Question

Find the volume of this sphere. Please help

Answer 1

Hello there!

We've already given the formula so I will not be adding it here.

We are also given that π = 3 for this problem.

r is defined as 'radius'

Radius is a point from center to one of endpoints.

Look at the image, the radius is given as 7cm.

From the information we gathered:

• π = 3
• r = 7

Substitute in the formula.

$\displaystyle \large{ V = \frac{4}{3} (3) {(7)}^{3} }$

Cancel 3 out.

$\displaystyle \large{ V = 4{(7)}^{3} }$

Evaluate 7^3

$\displaystyle \large{ V = 4(343) }$

Multiply

$\displaystyle \large{ V = 1372 }$

Therefore, the volume is 1372.

Let me know if you have any questions!

Topic: Surface Area and Volume - Sphere's Volume

Answer 2

Step-by-step explanation:

what's the problem ? your teacher even gave you the formula for the volume of a sphere and allowed you to round pi to simply 3. and he gave you the radius directly (not even "hidden" as diameter).

so, what is it you cannot do by yourself ? if you are unsure about doing these calculations in your head, use a calculator.

this is all much, much faster than uploading such a question here and waiting for a response, which very often will just be nonsense, because some people here just only make fun of such simple questions.

r = 7

pi = 3

so,

V = 4/3 × 3 × 7³ = 4 × 7³ = 4 × 343 = 1372 cm³

that's it.

please, when you have the time let me know, where the problem was, and if I can help you better understanding this problem.