A human body is 55% water. A person has a mass of 78 kg. How many kg. of water is in this person's body?
0.55 x 78 = ?
To find how many kilograms of water are in a person's body, you can multiply their body mass by the percentage of water content.
First, calculate the amount of water by multiplying the percentage by the mass:
Water content = 55% (0.55) * 78 kg
Multiply 0.55 by 78 kg:
Water content = 0.55 * 78 kg
Water content = 42.9 kg
Therefore, the water content in this person's body is approximately 42.9 kg.