Posted by **sara** on Thursday, September 6, 2012 at 1:08am.

Two bulldozers clear homes from a 20-acre tract of land. One works twice as fast as the other. It takes them three days to clear the tract working together. How long would it take each of them alone?

whats the equation?

- math -
**Anonymous**, Monday, May 2, 2016 at 12:12pm
t

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