document.write( "Question 732697: I need to pump water out of a swimming pool. My first pump will remove all the water in one hour. My second pump will remove all the water in four hours. How long will it take to remove all of the water in the pool using both pumps? \n" ); document.write( "

Algebra.Com's Answer #448036 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Add the rate of pumping
\n" ); document.write( " $\"+1%2F1+%2B+1%2F4+=+1%2Ft+\"$
\n" ); document.write( " $\"+4t+%2B+t+=+4+\"$
\n" ); document.write( " $\"+5t+=+4+\"$
\n" ); document.write( " $\"+t+=+4%2F5+\"$
\n" ); document.write( " $\"+%284%2F5%29%2A60+=+48+\"$
\n" ); document.write( "It will take 48 min using both pumps
\n" ); document.write( "check:
\n" ); document.write( " $\"+1%2F1+%2B+1%2F4+=+1%2F%284%2F5%29+\"$
\n" ); document.write( " $\"+4%2F4+%2B+1%2F4+=+5%2F4+\"$
\n" ); document.write( " $\"+5%2F4+=+5%2F4+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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