SOLUTION: A cubic foot of iron is formed into a bar 1/2 in. square, with no waste. Determine length of bar. Cu. ft. = 1728 cu. in. Unsure how to solve. Non-homework.

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Question 1130637: A cubic foot of iron is formed into a bar 1/2 in. square, with no waste. Determine length of bar.
Cu. ft. = 1728 cu. in.

Unsure how to solve. Non-homework.

Found 2 solutions by josmiceli, Boreal:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The volume of a cubic foot, converted to cubic
inches is:
+12%5E3+=+1728+ in3
Let +L+ = the length of the bar
The area of 1/2 inch square is:
+.5%5E2+=+.25+ in2
------------------------
I can say:
+.25%2AL+=+1728+
+L+=+6912+ in
Converted to feet, this is:
+6912%2F12+=+576+ ft

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=length of bar in inches
(1/2)(1/2)*x=1728, since those are the dimensions of a rectangular prism.
(1/4)x=1728 in^3.
x=6912 inches or 576 feet.