Question 1198027
If Joe can paint a house in 6 hours and Sam can paint
the same house in 8 hours how long does it take 
them to do in working together 
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Here's a "shortcut" usable for parallel work, parallel flows, parallel resistors, etc.
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 how long does it take them to do in working together?
6*8/(6+8) = 48/14 = 24/7 hours