How Can I Calculate the Volume of a Celestial Body with a Given Diameter?

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Homework Statement


The diameter of some celestial body is 2280 km. What is the volume of this body?



Homework Equations


how do i figure out this problem


The Attempt at a Solution

 
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Well we know that the radius is half the diameter, right? We also have an equation that relates volume to radius of a sphere. It is V = (4/3) * pi * r^3, where r is the radius. Hope that helps.