Angelina is painting her room. She wants a very specific shade of bright blue paint, so she mixes blue and green paint in a ratio of 2:1 if she needs 6 gallons of paint, how many gallons of blue paint should she but? Use a tape diagram to help organize your thinking

Answer 1

To determine the number of gallons of blue paint Angelina should buy, we need to use the given ratio of 2:1. Let's represent the ratio using a tape diagram.

We can start by drawing two sections for blue paint and one section for green paint. Since we need a total of 6 gallons of paint, we can divide the tape diagram into six equal parts.

Each blue section represents 2 gallons, and the green section represents 1 gallon.

So, if we fill all six parts, it would look like this:
[blue section] [blue section] [green section] [blue section] [blue section] [green section]

Now, to find how many gallons of blue paint Angelina should buy, we count the number of blue sections in the diagram. There are 4 blue sections painted in total.

Therefore, Angelina should buy 4 gallons of blue paint.