document.write( "Question 1093210: Sam can mow a lawn in 30 minutes. Melissa can mow the same lawn in 90 minutes. How long does it take for both Sam and Melissa to mow the lawn if they are working together? \n" ); document.write( "
Algebra.Com's Answer #707827 by Alan3354(69443)\"\" \"About 
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Or look at it like this:
\n" ); document.write( "Sam's work is that of 3 Melissas --> 4 Melissas.
\n" ); document.write( "90/4 = 22.5 minutes
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