document.write( "Question 809360: If two inlet pipes are both open, they can fill a pool in 1 hour and 30 minutes. One of the pipes can fill the pool by itself in 3 hours. How long would it take the other pipe to fill the pool by itself? \n" ); document.write( "

Algebra.Com's Answer #487561 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+t+\"$ = time in hrs for the other pipe to
\n" ); document.write( "fill the pool by itself
\n" ); document.write( "--------------------
\n" ); document.write( "Add their rates of filling to get the rate filling together
\n" ); document.write( "( 1 pool filled ) / ( 3 hrs ) + ( 1 pool filled ) / ( t hrs ) = ( 1 pool filled ) / ( 1.5 hrs )
\n" ); document.write( " $\"+1%2F3+%2B+1%2Ft+=++1%2F1.5+\"$
\n" ); document.write( "Multiply both sides by $\"+3t+\"$
\n" ); document.write( " $\"+t+%2B+3+=+2t+\"$
\n" ); document.write( " $\"+t+=+3+\"$
\n" ); document.write( "The other pipe can fill the pool by itself in 3 hrs also
\n" ); document.write( "check:
\n" ); document.write( " $\"+1%2F3+%2B+1%2F3+=+1%2F1.5+\"$
\n" ); document.write( " $\"+2%2F3+=+1%2F1.5+\"$
\n" ); document.write( "Multiply both sides by $\"+3+\"$
\n" ); document.write( " $\"+2+=+2+\"$
\n" ); document.write( "OK \n" ); document.write( "

\n" );