Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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13. Dan working alone can paint the outside of his house in 36 hours. Mary
working alone can paint the same house in 30 hours. If they work together, how
long will it take to paint this house?
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Transcribed Image Text:13. Dan working alone can paint the outside of his house in 36 hours. Mary working alone can paint the same house in 30 hours. If they work together, how long will it take to paint this house?
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