Bob needs to mix 2 cups of liquid lemonade. Concentrate with 3.5 cups of water to make lemonade. Bob has 6 cups of lemonade concentrate, how much lemonade can he make?

To make lemonade, Bob needs to mix 2 cups of concentrate with 3.5 cups of water. This means that for every 2 cups of concentrate, he can make 5.5 cups of lemonade (2 cups of concentrate + 3.5 cups of water).

If Bob has 6 cups of concentrate, he can make 6/2 = <<6/2=3>>3 batches of lemonade.
Each batch of lemonade is 5.5 cups, so Bob can make 3 * 5.5 = <<3*5.5=16.5>>16.5 cups of lemonade. Answer: \boxed{16.5}.

To find out how much lemonade Bob can make, we need to calculate the total amount of liquid when the concentrate is mixed with water.

First, let's determine the ratio of concentrate to water. From the given information, it states that 2 cups of liquid lemonade are made by mixing 1 cup of concentrate with 1.75 cups of water (3.5 cups of water divided by 2 cups of concentrate).

Now, to find out how much liquid Bob can make with 6 cups of concentrate, we need to multiply the given ratio by the amount of concentrate Bob has.

The ratio tells us that for every 1 cup of concentrate, we need 1.75 cups of water. Therefore, if Bob has 6 cups of concentrate, he will need 6 * 1.75 = 10.5 cups of water.

Adding the concentrate and water together, Bob can make 6 + 10.5 = 16.5 cups of lemonade. So, he can make 16.5 cups of lemonade using 6 cups of lemonade concentrate.

To determine how much lemonade Bob can make, we first need to figure out the ratio of concentrate to water in the lemonade.

Based on the information provided, the ratio is 1 part concentrate to 3.5 parts water.

Then, to calculate how much lemonade Bob can make from 6 cups of concentrate, we can use the ratio to find the total amount of liquid:

Total liquid = concentrate + water

Since the ratio is 1 part concentrate to 3.5 parts water, we can calculate by multiplying the amount of concentrate by the ratio:

Total liquid = 6 cups concentrate + (3.5 cups water per 1 cup concentrate × 6 cups concentrate)

Total liquid = 6 cups concentrate + (3.5 × 6 cups water)

Total liquid = 6 cups concentrate + 21 cups water

Now, we can add the amounts together to find the total amount of lemonade that Bob can make:

Total liquid = 6 cups concentrate + 21 cups water
Total liquid = 27 cups

Therefore, Bob can make a total of 27 cups of lemonade.