frustrum question

[steel briar]

Need help on this

Pls excuse the writings lol

[thick nymph]

ok good

now find vol of sphere

hemisphere*

and then do vol of hemisphere - vol of frustrum

[steel briar]

Bruh I know how to do this question

Idk why I'm not getting the right answer

I'd like someone to do it and then show me how they got their answer

The answer is like 138 or smthing

[kindred owl]

u sure?

i dont think im doing anything wrong

just checked gauthmath, my working is correct

[steel briar]

I got that as well

But it's apparently 138

On brainly it says that

[kindred owl]

i wouldn't trust brainly solutions

[kindred owl]

besides, here's the gauthmath working out if you want to compare it to the values in the question

[steel briar]

Yeah, I got 2027 as well but I thought brainly was right.