document.write( "Question 374130: Together Gunther and Gerta can peel a bushel of potatoes in 48 minutes. Working alone, it takes Gerta 28 minutes longer than Gunther to peel a bushel of potatoes. How long would it take for Gunther to do this job by himself? \n" ); document.write( "
Algebra.Com's Answer #266260 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Together Gunther and Gerta can peel a bushel of potatoes in 48 minutes. \n" ); document.write( " Working alone, it takes Gerta 28 minutes longer than Gunther to peel a bushel of potatoes. \n" ); document.write( "How long would it take for Gunther to do this job by himself? \n" ); document.write( ": \n" ); document.write( "Let g = Gun's time alone \n" ); document.write( "then \n" ); document.write( "(g+28) = Gert's time alone \n" ); document.write( ": \n" ); document.write( "Let the completed job = 1 \n" ); document.write( ": \n" ); document.write( "A typical shared work equation, each will do a fraction of the job, the two fractions add up to 1. \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( "Multiply by g(g+28) results: \n" ); document.write( "48(g+28) + 48g = g(g+28) \n" ); document.write( ": \n" ); document.write( "48g + 1344 + 48g = g^2 + 28g \n" ); document.write( ": \n" ); document.write( "96g + 1344 = g^2 + 28g \n" ); document.write( "Arrange as a quadratic equation on the right: \n" ); document.write( "0 = g^2 + 28g - 96g - 1344 \n" ); document.write( ": \n" ); document.write( "g^2 - 68g - 1344 = 0 \n" ); document.write( "you can use the quadratic formula to find g, but this will factor to: \n" ); document.write( "(g-84)(g+16) = 0 \n" ); document.write( "The positive solution \n" ); document.write( "g = 84 minutes, Gun's time alone \n" ); document.write( "; \n" ); document.write( ": \n" ); document.write( "Check solution \n" ); document.write( "48/84 + 48/112 = \n" ); document.write( ".57 + .43 = 1.00, confirms our solution \n" ); document.write( " |