Ten big water bottles can hold 20 gallons of water.
When writing unit rates, y goes over x. However, in the problem above, x represents the water bottles and y represents the gallons of water.
4/8 (x, y) -> 8/4 (y, x)
8/4 \ 4/4 = 2/1
Now, you know the constant rate of change. There are 2 gallons of water for every 1 big water bottle. Simply multiply 2 by 10.
Since you are looking for how many gallons of water in ten water bottles, multiply 2 gallons of water (I assume you now know that there are 2 gallons of water in every 1 big bottle) by the number of water bottles. In this case, 10.
To find out the amount of water ten big water bottles can hold, we have to find out how much water is in each water bottle. To do this, we divide the amount we are looking for by the number of items.
8 ÷ 4 = 2
Part 1 Each water bottle can hold 2 gallons of water.
Part 2
Now that we know the amount of water in each water bottle, we can find out how much water 10 water bottles can hold. To do so, we multiply our previous answer, 2, by the number of items (10).
2 • 10 = 20
Part 2 10 water bottles can hold 20 gallons of water.
4
Get Answer
15
