What is the question exactly?
3x+21-12=8x-28
collect the like terms
3x-8x=-28(21-12=9)
-5x=-28-9
-5x=-37
x=7.4
The answer is A, Brainliest please
Answer:
![\boxed{\sf 200\pi}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Csf%20200%5Cpi%7D)
Step-by-step explanation:
We know that the volume of a cone:-
![\boxed{\sf \pi r^2\cfrac{h}{3}}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Csf%20%20%5Cpi%20r%5E2%5Ccfrac%7Bh%7D%7B3%7D%7D)
(r = 10) (h = 6)
![\sf \pi \times 10^2\times\cfrac{6}{3}](https://tex.z-dn.net/?f=%5Csf%20%5Cpi%20%5Ctimes%2010%5E2%5Ctimes%5Ccfrac%7B6%7D%7B3%7D)
<u>Divide numbers:-</u>
![\sf \cfrac{6}{3}=\boxed{2}](https://tex.z-dn.net/?f=%5Csf%20%5Ccfrac%7B6%7D%7B3%7D%3D%5Cboxed%7B2%7D)
![\sf 10^2\times \:2\pi](https://tex.z-dn.net/?f=%5Csf%2010%5E2%5Ctimes%20%5C%3A2%5Cpi)
![\sf 100\times \:2\pi](https://tex.z-dn.net/?f=%5Csf%20100%5Ctimes%20%5C%3A2%5Cpi)
<u>Multiply numbers:-</u>
![\boxed{\sf 200\pi}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Csf%20200%5Cpi%7D)
Therefore, your answer is 200π³
We could also multiply 200 by 3.14 which will give you 628 units³.