Source: Official Guide for GMAT Review 2016 Problem Solving; #71

1

On a certain day, orangeade was made by mixing a certain amount of orange juice with an equal amount of water. On the next day, orangeade was made by mixing the same amount of orange juice with twice the amount of water. On both days, all the orangeade that was made was sold. If the revenue from selling the orangeade was the same for both days and if the orangeade was sold at \$0.60 per glass on the first day, what was the price per glass on the second day?

### 2 Explanations

1

Yayu Xu

I guess it's culture difference that makes this question hard for me to understand. I can't quite get the "gallon "and "cup"things...
So the important thing we need to know from the question is" the same amount of orange juice was used "?

Mar 2, 2017 • Comment

Hi Yayu,

Good question. Mike is using "gallons" as a general placeholder for volume, not as a precise unit of measure here. You can replace "gallons" and "cups" with whatever you're familiar with and the explanation will still be valid. What's important to see here is that the total revenue from selling OJ is the same both days, but there is a higher total volume of OJ sold the second day.