Question

The base of a hemisphere has an area of 256π cm2.
Find its volume.

Answer 1

In calculus or geometry?

Answer 2

geometry

Answer 3

OK. Then you get to use the formula. In calculus, you get to find the formula. Hehe.

Know the formula for the volume of a sphere?

Answer 4

no

Answer 5

AH! Then that is the real problem. In geometry, you are given these somewhere in the book and supposed to somehow remember them.

http://math.about.com/library/blmeasurement.htm

Answer 6

The sphere is the las one there. Now, know what the term hemisphere means?

Answer 7

can u please just give me the answer

Answer 8

Why would I do that? Have you read the Code of Conduct for the site? When you sign up here, you agree not to just hand out answers.

Answer 9

then write the steps down with it

Answer 10

I am willing to show you the steps. I have already shown you the first, finding the right formulas. If you do the work, you will have the answer very soon.

Answer 11

ok volume equals 4/3 pr3

Answer 12

wat do i do now

Answer 13

Well, the p means \(\pi\). And a hemishphere is HALF a sphere. So if you find the volume of the sphere, half that is your answer. That is where it is heading. But that formula wants the radius, r. So the first step is finding the radius. Do you know how to do that from what was given?

Answer 14

yes thanks

Answer 15

Good! To sumarize: once you get the radius from the area, use the sphere formula, half that. Done.