Maria can weed 1000 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 to weed 6,000m2, then what area is done by each one of them?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Maria can weed 1000 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 to weed 6,000m2, then what area is done by each one of them?

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