document.write( "Question 619812: suppose that two hoses are working together to fill a swimming pool.one of the hoses can fill the pool alone in 7 hours the other can fill the pool alone in 12 hours how long would it take both hoses to fill the pool together? \n" ); document.write( "

Algebra.Com's Answer #389801 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
\n" );
document.write( "Hi,
\n" );
document.write( "two hoses are working together to fill a swimming pool.
\n" );
document.write( "one of the hoses can fill the pool alone in 7 hours the other can fill the pool alone in 12 hours 
\n" );
document.write( "how long     would it take both hoses to fill the pool together?
\n" );
document.write( "  PER hr KEY
\n" );
document.write( " 1/7 + 1/12 = 1/x   |Multiplying thru by 84x so as all denominators = 1
\n" );
document.write( "  12x + 7x = 84
\n" );
document.write( "    19x = 84
\n" );
document.write( "      x = 4.42 hr \n" );
document.write( "

\n" );