SOLUTION: A company that mixes and sells concrete has a contract to deliver several loads of concrete containing an aggregate that is 20% sand by weight. the company has a pile that contains

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Question 1041599: A company that mixes and sells concrete has a contract to deliver several loads of concrete containing an aggregate that is 20% sand by weight. the company has a pile that contains 360,000 lb if aggregate that is 15% sand. How much sand will be required to mix with the aggregate in this pile to produce a picture that is 20% sand?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Available is 360000 pounds of 15% sand.

Objective is to add some p pounds of sand to increase the percentage to 20%.

Study this lesson: two part mixture, one part known, other part unknown