My Math Forum Geometry or weights?

 Geometry Geometry Math Forum

 September 2nd, 2009, 03:57 PM #1 Newbie   Joined: Sep 2009 Posts: 22 Thanks: 0 Geometry or weights? Two parallel shelves, each exactly 138 cm long, have exactly 32 cm of space between them. A circular hoop is placed between the shelves. The hoop's cross-section is a 2.5 cm square. The hoop barely touches the top shelf, and rests on the corners of the bottom shelf, as shown . If the hoop's density is 7.85 grams per cubic centimetre, what is the hoop's total mass?
 September 2nd, 2009, 03:59 PM #2 Newbie   Joined: Sep 2009 Posts: 22 Thanks: 0 Re: Geometry or weights? i don't know if the image is showing or not but here is the link http://yfrog.com/6ccircleshelvesp
 September 2nd, 2009, 05:07 PM #3 Global Moderator     Joined: Oct 2008 From: London, Ontario, Canada - The Forest City Posts: 7,662 Thanks: 965 Math Focus: Elementary mathematics and beyond Re: Geometry or weights? Here's a start: sagitta properties.

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