document.write( "Question 457756: one pipe can fill the pool in 3 hours.another pipe can fill the pool in 6 hours. The first pipe started filling at 9am and the other pipe started filling at 10am. how long would it take to fill the pool? \n" ); document.write( "

Algebra.Com's Answer #314063 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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one pipe can fill the pool in 3 hours. another pipe can fill the pool in 6 hours.
\n" ); document.write( " The first pipe started filling at 9 am and the other pipe started filling at 10am.
\n" ); document.write( " how long would it take to fill the pool?
\n" ); document.write( ":
\n" ); document.write( "Let t = time for both pipes to fill the pool
\n" ); document.write( ":
\n" ); document.write( "Let the completed job = 1 (A full pool)
\n" ); document.write( ":
\n" ); document.write( "Write a shared work equation, the 2nd pipe on 1 hr less
\n" ); document.write( ":
\n" ); document.write( " $\"t%2F3\"$ + $\"%28t-1%29%2F6\"$ = 1
\n" ); document.write( "multiply by 6
\n" ); document.write( "2t + t - 1 = 6
\n" ); document.write( "2t + t = 6 + 1
\n" ); document.write( "3t = 7
\n" ); document.write( "t = $\"7%2F3\"$ hrs, 2 hrs 20 min from the time the 1st pipe was turned on \n" ); document.write( "

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