cones

[knotty badger]

1. Ask your question and show the work you've done so far. If you've posted a screenshot of a question, specify which part you need help with.
2. Wait patiently for a helper to come along.
3. Once someone helps you, say thank you and close the thread with:

   +close
   

4. Feel free to nominate the person for helper of the week in #helper-nominations
5. Do not ping the mods, unless someone is breaking the rules.
6. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[brittle aurora]

For context in part a I got the full volume of the cone

[raw sandal]

Ok it's correct

For volume of B

[raw sandal]

Do volume of full cone - voume of A

Or you can use formula of volume of frustum of cone

[buoyant wasp]

Using volume of frustum is only going to get you so far, it's better to just do full cone - volume of A

But if you want to use frustum then there is no one stopping you

[brittle aurora]

What’s frustum

The only thing known to find the volume of A is its height

There isn’t a radius of diameter to work out the volume

But since the cone was cut in half I guess the diameter of A is 10

[buoyant wasp]

A part of a cone

[brittle aurora]

I’ll use full cone - part A

[buoyant wasp]

Ok

[brittle aurora]

It’s what I learned

To three significant figures

[raw sandal]

You calculation is wrong