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 February 28th, 2012, 05:08 PM #1 Newbie   Joined: Feb 2012 Posts: 5 Thanks: 0 Conversion I have some material that weighs 20lbs per cubic meter. I have a piece of that material that is 1 x 1 x 1.5 cubic feet. I need to know how much this piece weighs?
 February 28th, 2012, 05:56 PM #2 Global Moderator     Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 4 Re: Conversion "1 x 1 x 1.5 cubic feet" isn't meaningful. 1ft x 1 ft x 1.5 ft = 1.5 cubic feet Anywho. So each cubic foot weighs a certain amount, and you have 1.5 cubic feet...
 February 28th, 2012, 08:00 PM #3 Newbie   Joined: Feb 2012 Posts: 5 Thanks: 0 Re: Conversion So, I convert 1.5 cubic feet to cubic meters and then multiply by 20?
 February 28th, 2012, 08:07 PM #4 Global Moderator     Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 4 Re: Conversion Yes.
 February 28th, 2012, 08:16 PM #5 Senior Member     Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 520 Math Focus: Calculus/ODEs Re: Conversion Yes, one way to do this: $\frac{3}{2}\:\text{ft^3}$$\frac{127\text{ cm}}{50\text{ in}}\cdot\frac{12\text{ in}}{1\text{ ft}}\cdot\frac{1\text{ m}}{100\text{ cm}}$$^3=\frac{165919023}{3906250000}\:\text{m^3}\ approx0.042475269888\text{ m^3}$ Weight = weight density times volume, thus: $w=$$20\text{ \frac{lb}{m^3}}$$$$\frac{165919023}{3906250000}\:\ text{m^3}$$=\frac{165919023}{1953312500}\:\text{lb }\approx0.84950539776\text{ lb}$
 February 29th, 2012, 07:28 AM #6 Newbie   Joined: Feb 2012 Posts: 5 Thanks: 0 Re: Conversion Thanks a bunch!

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