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if the human body consists of 2/3 of water by mass find the percentage of water in a person of mass 45kg

Question

If the human body consists of 2/3 of water by mass, find the percentage of water in a person of mass 45 kg.

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Solution

Sure, here's how you can calculate it:

  1. First, understand that when we say the human body is 2/3 water by mass, it means that 2/3 of the total body mass is water.

  2. To find the mass of water in a 45kg person, multiply the total mass by 2/3.

    Calculation: 45kg * 2/3 = 30kg

  3. To convert this to a percentage, divide the mass of the water by the total mass and then multiply by 100.

    Calculation: (30kg / 45kg) * 100 = 66.67%

So, a 45kg person is approximately 66.67% water by mass.

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