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)![]() ![]() You can put this solution on YOUR website! 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 \n" ); document.write( " |