document.write( "Question 373427: By checking work records, a plumber finds that Raul can plumb a house in 48hr. Mira can do the same job in 36hr. How long would it take if they worked together? \n" ); document.write( "
Algebra.Com's Answer #265781 by robertb(5830)\"\" \"About 
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\"x%281%2F48%2B1%2F36%29+=+1\",
\n" ); document.write( "\"x%287%2F144%29+=+1\",
\n" ); document.write( "\"x+=+144%2F7\", approximately 20.57 hours.
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