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21 January, 21:29

The diameter of a planet is about 25,464 mi. The diameter of the planet's moon is about 21 % of the diameter of the planet. What percent of the volume of the planet is the volume of its moon?

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  1. 22 January, 01:09
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    The diameter of the moon:

    25,464 (.21) = 5,347.44

    The radius of the moon:

    5,347.44/2 = 2,673.72

    The volume of the moon:

    80,063,834,021.277

    The volume of the planet:

    8,645,268,763,770.284

    80,063,834,021.277 / 8645268763770.284 = 0.009261

    0.0092%
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