Posted by becky on Monday, February 1, 2010 at 5:05am.
Add the RATES that they mow lawns.
1/6 lawn/h + 1/5 lawn/h = 11/30 lawn/h
The combined rate times the time reT equals one lawn
11/30 * T = 1 lawn
T = 30/11 hours
Add the RATES that they each mow lawns.
1/6 lawn/h + 1/5 lawn/h = 11/30 lawn/h
The combined rate times the time required, T, equals one lawn
11/30 * T = 1 lawn
T = 30/11 hours
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