Suppose that a lawn can be raked by one gardener in 4 hours and a second gardener in 7 hours. How long will it take them to take one together?
The two gardeners can raked the lawn in 2.54 hours if they work together.
Answered by kgb agent Maria T on Wednesday, August 29 2012 at 09:33PM EDT
Source:
www.mathgoodies.com/...
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