The density of a person on Earth would remain the same if Earth had 10 times its present mass but the same volume.
To find the factor by which a person's weight would increase if Earth had 10 times its present mass but the same volume, we use the ratio of mass to volume.
We know that density = mass/volume. If both mass and volume increase by 10 times, the density remains the same. Therefore, the answer is a. The same.
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