document.write( "Question 988653: one crew can seal a parking lot in 12 hours and another can seal it in 16 hours. How long will it take to seal the parking lot if the two crews work together? \n" ); document.write( "
Algebra.Com's Answer #609140 by Boreal(15235)\"\" \"About 
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In one hour, one person can seal (1/12) and the other (1/16)
\n" ); document.write( "In one hour, both can seal (1/12)+(1/16)=(7/48)
\n" ); document.write( "in 48/7 hours (6.857 hours), they can seal it, working together.
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