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About 80% of the mass of the human body is water. If Clare weighs 60 kg, how many kilograms of water make up her body weight?

A. 48 kg
B. 60 kg
C. 72 kg
D. 84 kg

Answer :

Final answer:

By multiplying Clare's total body weight of 60 kg by 80%, which is converted to 0.8 as a decimal, we find that Clare has 48 kg of water in her body.

Explanation:

To calculate how many kilograms of water make up Clare's body weight, we use the percentage given that about 80% of the human body is water. If Clare weighs 60 kg, the weight of the water in her body can be calculated as follows:

  1. Convert the percentage of water to a decimal by dividing 80 by 100, which gives us 0.8.
  2. Multiply Clare's total body weight by the decimal to find the weight of water: 60 kg × 0.8 = 48 kg.

Therefore, Clare has 48 kg of water in her body.

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