document.write( "Question 128273: 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 #93914 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! LETS TAKE 2 AT A TIME \n" ); document.write( "5*10/15=50/15=3.333 \n" ); document.write( "NOW COMBINE THIS WITH THE THE 15 MINUTE MIXER \n" ); document.write( "3.33*15/3.33+15=49.95/18.33=2.73 MINUTES WHEN THEY WORK TOGETHER. \n" ); document.write( "OR: \n" ); document.write( "20/5=4 DRINKS PER MINUTE. \n" ); document.write( "20/10=2 DRINKS PER MINUTE. \n" ); document.write( "20/15=1.33 DRINKS PER MINUTE. \n" ); document.write( "4+2+1.33=7.33 DRINKS PER MINUTE WHEN ALL THREE WORKING. \n" ); document.write( "20/7.33=2.73 MINUTES TO MIS 20 DRINKS WORKING TOGETHER. \n" ); document.write( " |