# Thread: Math help for a DTY project

1. ## Math help for a DIY project

I need to figure out a length of a cylinder
I know the volume (800ci) and the radius, (1.5")
I need to know the height/length
If:
V=3.14 x r2 x h
800ci = 3.14 x 2.25 x h
800 = 7.065 x h
or 800/7.065 = h
h = 113.23"

? ? ?

Thanks eh

2. 37.72562 ft
that sound right?

I need to figure out a length of a cylinder
I know the volume (800ci) and the radius, (1.5")
I need to know the height/length
If:
V=3.14 x r2 x h
800ci = 3.14 x 2.25 x h
800 = 7.065 x h
or 800/7.065 = h
h = 113.23"

? ? ?

Thanks eh
Checks out to me. if you use PI to a few more digits you get h=113.17" But maybe Pi = 3.14 in Canada....

4. no no 9.41 ft... about 113 inches long

5. yeah that's right... i messed up in my first one ;o) but i quickly saw my mistake

I need to figure out a length of a cylinder
I know the volume (800ci) and the radius, (1.5")
I need to know the height/length
If:
V=3.14 x r2 x h
800ci = 3.14 x 2.25 x h
800 = 7.065 x h
or 800/7.065 = h
h = 113.23"

? ? ?

Thanks eh
I'm no math scholar

Edited to let that statement stand by itself as ontological proof of it's truth.

7. DTY?

lengthen your message to at least 10 characters.

8. 113.177 Inches

Pi * r ^ 2 * h = v

Pi * 1.5 ^2 * h = 800

h = v / ( Pi * r ^2 )

h = 800 / (Pi * 1.5 ^2)

h = 800 / 7.06858

h = 113.177

( really roughly: )
h = ~ 113 3/16

9. I think it is a little more than 113, but I didn't use math. It came to me in a premonition.
.

10. What is this "math" you speak of??????

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