Question

How many kg of water are in a 132 kg person ?

Answer 1

`88kg\text{ of water}`

Step-by-step explanation:

Here, we want to get the number of kg of water in a 132 kg person

From the question, there is a direct variation between kg of water in the human body and the mass of the body

Let the mass be m and the amount of water be w

By direct variation, with k as the proportionality constant, we have it that:

`w\text{ = }km`

From the question, a 72 kg mass boy has 48 kg of water

Mathematically, we have it that:

`\begin{gathered} 48\text{ = k }*72 \\ k\text{ = }(48)/(72) \\ \end{gathered}`

Now, we want to get the kg of water in a 132 kg person

What we have to do here is to have k as 48/72 and solve for w

Mathematically, we have that as:

`\begin{gathered} w\text{ = }(48)/(72)*132 \\ \\ w\text{ = 88 }kg \end{gathered}`