Date: 08/09/97 at 18:18:45 From: Paul Taylor Subject: Production Estimating the number of linear feet in 1 sq. ft. Making wood flooring, width is 3.25 inches. Goal is to produce 5,000 sq. ft. per day.
Date: 08/10/97 at 03:07:57 From: Doctor Mike Subject: Re: Production Hi Paul, Let me make sure I understand the question first. ___________________________________________ | | | | 3.25 in. |___________________________________________| X ft. In this picture set-up, you want to know how many feet X is so that this board, which is X linear ft. long, will contain exactly ONE square foot of area. If that's not it, write back. The way to do this is FIRST to figure what the area of the pictured board (above) actually is. You do that by multiplying the two dimensions together, but with the same length units. In inches, the dimensions are 3.25 and 12*X (12 times X). That makes the area 3.25*12*X sq. in. SECOND we need to see that a square foot of area will have 144 square inches (12 times 12). With this we can set up an equation as follows: 3.25*12*X = 144 or 39*X = 144 or X = 144/39 = 48/13 = 3.6923 (approx.) Since we now know that (48/13) linear ft. of 3.25 in. wide board is ONE sq. ft. in area, you take 5000 times that length to get 5000 sq. ft. of area. That is (48/13)*5000 = 18461.538 (approx.) So, I guess your goal would be 18462 linear feet or 6154 linear yards per day. Is that reasonable? You said something about estimating. With calculators around so much it is pretty easy to keep and use the conversion factor in its 48/13 exact form instead of the decimal approximation. Just multiply the desired square footage by 48/13 to get linear footage. (That is, multiply square footage by 48 and divide that by 13.) Multiply actual linear footage by 13/48 to get square footage. I hope this helps. -Doctor Mike, The Math Forum Check out our web site! http://mathforum.org/dr.math/
Search the Dr. Math Library:
Ask Dr. MathTM
© 1994- The Math Forum at NCTM. All rights reserved.