document.write( "Question 129873: Problem is from http://www.testprepreview.com/modules/algebra2.htm \r
\n" );
document.write( "\n" );
document.write( "If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks? \n" );
document.write( "
Algebra.Com's Answer #94844 by edjones(8007)![]() ![]() You can put this solution on YOUR website! Steven can do 1/5 of the job in 1 minute, Sue 1/10 and Jack 1/15 in 1 minute. \n" ); document.write( "Let j= the job. \n" ); document.write( "1/5 + 1/10 + 1/15 \n" ); document.write( "6/30 + 3/30 + 2/30 = 11/30 of the job in 1 minute. \n" ); document.write( "30/11= 2 8/11 minutes to mix 20 drinks together. \n" ); document.write( "2 min 43.6 sec. \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |