document.write( "Question 987358: The weight-carrying capacity of a rectangular beam varies jointly with its width and the square of its height and inversely as its length. If a beam is 4 inches wide, 6 inches high, and 10 feet long, it has a carrying capacity of 1400 pounds. Find the carrying capacity of a beam made of the same material if it is 3 inches wide, 5 inches high, and 12 feet long. \n" ); document.write( "
Algebra.Com's Answer #608096 by Boreal(15235)\"\" \"About 
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W=k w*h^2/L
\n" ); document.write( "1400=k 4*36/10=k*14.4
\n" ); document.write( "k=100
\n" ); document.write( "=====
\n" ); document.write( "W=100*3*25/12=100* (75/12)=625 lb
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