SOLUTION: A certain paint colour is created by mixing 3 parts of red with every 5 parts of blue. How many gallons of red paints are needed to mix 40 gallons of this colour

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Question 1174829: A certain paint colour is created by mixing 3 parts of red with every 5 parts of blue. How many gallons of red paints are needed to mix 40 gallons of this colour
Answer by ikleyn(52780) About Me  (Show Source):
You can put this solution on YOUR website!
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A certain paint colour is created by mixing 3 parts of red with highlight%28cross%28every%29%29 5 parts of blue.
How many gallons of red paints are needed to mix 40 gallons of this colour
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            Pay attention on how I edited your post in order for it would make sense. 


In all, there are 3 + 5 = 8 equal parts.


Each part is 40/8 = 5 gallons.


Hence, the amount of red paint is  3*5 = 15 gallons.    ANSWER

Solved.