Question

kevin uses 84 fl oz of water to make an all-purpose cleaner. The directions call for 4 fl oz of concentrated soap for every 3 cups of water. How many fl oz of soap should he use? ( 1 cup = 8 fl oz )

Answer 1

Given:

3 cups of water = 4 Fl of concentrated soap

To Find:

Find amount of soap needed for 84 fl oz of water

Solution:

Find amount of soap 1 cup of water of water

$3 \text{ cup of water} = 4 \text{ fl oz of soap}$

$1 \text{ cup of water} = 4 \div 3$

$1 \text{ cup of water} = \dfrac{4}{3} \text { fl oz of soap}$

Find amount of soap 84 cup of water of water

$1 \text{ cup of water} = \frac{4}{3} \text { fl oz of soap}$

$84 \text{ cup of water} = \dfrac{4}{3} \times 84$

$84 \text{ cup of water} = 112 \text{ fl oz of soap}$

$\textbf{Answer: 84 fl of water needs 112 fl oz of concentrated soap}$