## anonymous 3 years ago Help! I give medals:) Pic below find the height and surface area of the right circular cylinder with the height equal to the diameter. Show work

1. anonymous

Height=2r Volume-128pic

2. anonymous

Surface area of a circle is $r ^{2} \pi$ Volume is surface area of a circle multiplied by height. So, 128 = 2r * r (squared)*P

3. anonymous

how do I solve for r?

4. anonymous

$r ^{2}\pi * 2r = 182$ $r ^{3}\pi=64$ $r = \sqrt[3]{20.37}$ r=2.73

5. anonymous

OOh ok LOL Thank You so much :)

6. anonymous

Numbers are weird, but that's the only way I see how it's done :)

7. anonymous

as long as the answer n work r right that's all that matter in math LOL