Water in body

Water in the human organism of all the compounds represented constitutes about 3/5 of the total weight. How many kilograms of water is in your body when you weigh 51 kg?

Correct answer:

x =  30.6 kg

Step-by-step explanation:

$$\begin{gathered} m_1=51\text{kg} \\ q=\frac{3}{5}=0.6 \\ x=q\cdot m_1=\frac{3}{5}\cdot 51=\frac{3\cdot 51}{5}=\frac{153}{5}=\frac{153}{5}\text{kg}=30.6\text{kg} \end{gathered}$$

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