Posted by anonymous on Saturday, October 8, 2011 at 12:46pm.
Arthur can paint a room in 6 hours. Boris can paint the same room in 8 hours. If boris and arthur work together, how long will it take for them to paint the room

math  Steve, Saturday, October 8, 2011 at 1:34pm
1/both = 1/6 + 1/8
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