Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2006-04-16 10:28:04

Hrslvr1612
Member
Registered: 2005-12-12
Posts: 13

Help please!!

A cylindrical water bottle is 28 cm in diameter. how many centimeters does the water level drop when on liter is drawn off?

Please help!! thank you so much!!

Offline

#2 2006-04-16 10:48:23

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,562

Re: Help please!!

1000 / (196 pi)


igloo myrtilles fourmis

Offline

#3 2006-04-16 11:12:49

Hrslvr1612
Member
Registered: 2005-12-12
Posts: 13

Re: Help please!!

I dont understand what you mean

Offline

#4 2006-04-16 11:40:05

John E. Franklin
Member
Registered: 2005-08-29
Posts: 3,562

Re: Help please!!

Okay, I just ate supper, but now I'm back.
1 CC is 1 ml, so 1000 ml = 1000 cubic centimeters.
A CC is about the size of a sugar cube.

The 196 comes from 14 times 14 because pi r squared is area of a circle.
So I divided 1000 milliliters (1 liter) by the circle area to get the height.
Units: cm cubed divided by cm squared is cm
3-D (cubed) divided by 2-D slice (the circle area) = height of cylinder.

Last edited by John E. Franklin (2006-04-16 11:43:26)


igloo myrtilles fourmis

Offline

#5 2006-04-16 12:41:36

Hrslvr1612
Member
Registered: 2005-12-12
Posts: 13

Re: Help please!!

o ok thanks

Offline

Board footer

Powered by FluxBB