Question

If 5 liters cost $2.50, then how much would it cost for 9 liters?

Answer 1

5:$2.50

9:?

divide 5 by both sides cause you wanna see how much is 1 liter so you can multiply that with 9.

5 divided by 5 is 1.

$2.50 divided by 5 is $0.50

1:$0.50

each liter costs $0.50

Multiply $0.50 with 9 and that is $4.50

the answer is $4.50

Answer 2

$4.50

Explanation:

To solve a problem like this one, we can use the simple ratio method to find the cost for 9 liters, here in this case.

We know that, 5 liters (of something) cost $2.50. So to find the cost for 9 liters, we can assume its cost to be x and can write it as:

`(5 liters)/(9 liters) = (2.50)/(x)`

Now solving for x to get:

`x = (2.50*9)/(5)`

`x=4.5`

Therefore, 9 liters would cost $4.50.