document.write( "Question 937983: 1 pool pump takes 60 minutes to fill up a pool, another pool pump takes 40 minutes to fill up a pool, how long would it take of both pumps were used to fill up the pool? \n" ); document.write( "

Algebra.Com's Answer #571330 by stanbon(75887) $\"\"$ $\"About$

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1 pool pump takes 60 minutes to fill up a pool, another pool pump takes 40 minutes to fill up a pool, how long would it take of both pumps were used to fill up the pool?
\n" ); document.write( "--------
\n" ); document.write( "1st pump DATA:
\n" ); document.write( "time = 60 min/job ; rate = 1/60 job/min
\n" ); document.write( "----
\n" ); document.write( "2nd pump DATA:
\n" ); document.write( "time = 40 min/job ; rate = 1/40 job/min
\n" ); document.write( "-----
\n" ); document.write( "Together DATA:
\n" ); document.write( "time = x min/job ; rate = 1/x job/min
\n" ); document.write( "---
\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/60 + 1/40 = 1/x
\n" ); document.write( "----
\n" ); document.write( "40x + 60x = 40*60
\n" ); document.write( "100x = 2400
\n" ); document.write( "x = 24 minutes (time to fill the pool together)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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