document.write( "Question 1010035: Working together, Chip and Dale can clean a stadium in 72 minutes. Chip working alone would take three hours to clean the same section. How long would it take Dale to clean the section if he was working by himself? \n" ); document.write( "

Algebra.Com's Answer #625514 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+t+\"$ = Dale's time in hrs
\n" ); document.write( " $\"+72%2F60+=+1.2+\"$
\n" ); document.write( "------------------
\n" ); document.write( "rate working together:
\n" ); document.write( "[ 1 stadium ] / [ 1.2 hrs ]
\n" ); document.write( "Chip's rate working alone:
\n" ); document.write( "[ 1 stadium ] / [ 3 hrs ]
\n" ); document.write( "Dale's rate working alone:
\n" ); document.write( "[ 1 stadium ] / [ t hrs ]
\n" ); document.write( "---------------------
\n" ); document.write( "Add their rates of working to get their rate
\n" ); document.write( "working together
\n" ); document.write( " $\"+1%2F3+%2B+1%2Ft+=+1%2F1.2+\"$
\n" ); document.write( "Multiply both sides by $\"+1.2%2A3%2At+\"$
\n" ); document.write( " $\"+1.2t+%2B+1.2%2A3+=+3t+\"$
\n" ); document.write( " $\"+1.8t+=+3.6+\"$
\n" ); document.write( " $\"+t+=+2+\"$
\n" ); document.write( "It would take Dale 2 hrs working alone
\n" ); document.write( "check:
\n" ); document.write( " $\"+1%2F3+%2B+1%2F2+=+1%2F1.2+\"$
\n" ); document.write( " $\"+.333+%2B+.5+=+.833+\"$
\n" ); document.write( " $\"+.833+=+.833+\"$
\n" ); document.write( "OK \n" ); document.write( "

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