Since the seal weighs 20 kilograms. This is one part.
And an adult seal is 20 parts.
We get the proportions:
20 kilograms – 1 piece;
X kilogram – 20 pieces.
Let’s multiply the parts of the proportions.
X * 1 = 20 * 20;
X = 400 kilograms – the weight of an adult seal.
Answer: The weight of an adult seal is 400 kilograms.
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