SOLUTION: Raphael can load a large shipping truck in 12 hours. Working together, Raphael and Jana can load the same truck in 3 hours. How long would it take Jana to load the truck by herself

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Question 313862: Raphael can load a large shipping truck in 12 hours. Working together, Raphael and Jana can load the same truck in 3 hours. How long would it take Jana to load the truck by herself?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
in 3 hr, Raphael loads 1/4 (3/12) of the truck

Jana loads the other 3/4 in the 3 hr, so she could load the entire truck in 4 hr by herself