Question

Help! i give medals
Find the height and surface area of the right cylinder with the height equal to the diameter (volume is 128pi cubed)

Answer 1

Well you know the volume is \(\pi r^2h\) you can use the dimensions you are given to solve for 'r'. Your surface area is \(2\pi rh + 2\pi r^2\) plug and chug.

Answer 2

so is it \[128\pi=pir2r\]

Answer 3

\[128\pi^3=\pi(r^2)(2r)\]

Answer 4

\[128\pi^3= \pi(2)r^3\]

Answer 5

\[\frac{ 128\pi^3 }{ \pi }=\frac{ 2\pi(r^2) }{ \pi} \]

Answer 6

128pi^2=2r^2
64pi^2=r^2

Answer 7

8pi = r

Answer 8

r=8

Answer 9

8pi

Answer 10

good?

Answer 11

thank you for your help
much appreciated

Answer 12

yw