document.write( "Question 1188646: Maria can weed 1,000 m² of cogonal farm surface in 40 hours, while her brother, Bryant, can do the same amount of work in 20 hours. If they work together, how long will it take them to weed one hectare (10,000 m2) of cogonal land surface? \n" ); document.write( "
Algebra.Com's Answer #819773 by Shin123(626)\"\" \"About 
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In 1 hour, Maria can weed \"1000%2F40=25\" m2, and Bryant can weed \"1000%2F20=50\" m2.
\n" ); document.write( "Working together, they can weed \"25%2B50=75\" m2 per hour.
\n" ); document.write( "Therefore, it will take them \"10000%2F75=133%261%2F3\" hours.
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