SOLUTION: a mason can make a wall in 6 hours. His helper takes 9 hours. In how many hours can they make the wall together.
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Question 69796: a mason can make a wall in 6 hours. His helper takes 9 hours. In how many hours can they make the wall together. Answer by checkley75(3666) (Show Source):
You can put this solution on YOUR website! 6*9/(6+9)=54/15=3.6 HOURS TO COMPLETE THE WALL WORKING TOGETHER
(THIS IS KNOWN AS THE PRODUCT/SUM SOLUTION)
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