Question

Find the radius of a cylinder with a volume of 118.79 feet cubed and a height of 5 feet.
A)3.45
B)1.94
C)2.52
D)2.75

Answer 1

\[\text{volume of cylinder}=\pi r^2 h\]\[118.79=\pi r^2 \times 5 \]now solve for r

Answer 2

^ AWESOME MEMBER ON THE SITE ^_^

Answer 3

Lol .. nothing compared to you xD

Answer 4

@lalaly : how do i solve for r ?

Answer 5

Isolate r.

Answer 6

xP

Answer 7

divide by 5pi ... then take the squareroot of both sides ...

Answer 8

lol you won

Answer 9

haha

Answer 10

dont understand /:

Answer 11

do u know how to make r subject of the formula

Answer 12

no math is my worst subject. i never understand anything ):

Answer 13

hmm ... u are asked to find the radius .. which is r ... so u have to make r on one side all alone to find its value... ill walk u through it... from the equation i gave u for the volume what do u think u should do to make r alone

Answer 14

3.14(5) ?

Answer 15

yeah so divide both sides by that to get rid of them ... so u will have\[\frac{118.79}{5 \times 3.14}=r^2\]now find that value

Answer 16

i got 7.56624

Answer 17

yeah thats right,,,
now thats the value of r^2 ... what do u think we sould do to make it r?

Answer 18

ummm divide that by 5 ?

Answer 19

noo where did the 5 come from
You have\[\large{r^2=7.56624}\]how can u make it r= a number

Answer 20

idk i told you i was bad at math. but do you divide that by pi?

Answer 21

u take the square root of both sides

Answer 22

2.75 is my answer (:

Answer 23

yep thats right

Answer 24

thank you so much. if my teachers went step by step like that i wouldnt of been in this situationlol

Answer 25

lol its ok just keep trying and ull learn ... Ur welcome and goodluck:)