Answer :

Final answer:

The lean body mass of a 67-kg male marathoner with 4.8% body fat is approximately 63.784 kg. This is calculated by subtracting the mass of body fat (calculated by multiplying body mass and body fat percentage) from the total body mass.

Explanation:

The lean body mass of a 67-kg male marathoner with 4.8% body fat is calculated by subtracting the mass of body fat from the total body mass. In this case, body fat is determined by multiplying the body mass (67kg) by the body fat percentage (4.8%).

Step 1: Calculate body fat mass = 67kg * 4.8 / 100 = 3.216 kg

Step 2: Calculate lean body mass = Total body mass – Body fat mass = 67 kg – 3.216 kg = 63.784 kg.

So, the lean body mass of the male marathoner is approximately 63.784 kg.

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