Question

The number of kilograms of water in a human body varies directly as the mass of the body. A 96-kg person contains 64 kg of water how many kilograms of water are in a 66-kg person?

Answer 1

ANSWER:

44 kg

STEP-BY-STEP EXPLANATION:

Since they vary directly, we can calculate the amount of water by means of the following proportion:

$\begin{gathered} \frac{64}{96}=\frac{x}{66} \\ \text{ we solve for x} \\ x=66\cdot\frac{64}{96} \\ x=44\text{ }kg\text{ of waer} \end{gathered}$

So that's 44 kilograms of water in a 66-kilogram person.