Question 408053: A contractor mixes concrete from bags of pre-mix for small jobs. How many bags of 3% cement should he mix with 5 bags of 28.2% cement to produce a mix containing 12% cement.
I have been trying for two days on this problem. I have gotten different answers everytime. I am using a picture, table and still not getting it.
Please help!! Answer by scott8148(6628) (Show Source):