a spherical float is 42cm in diameter. what is its volume in liters.
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$\displaystyle Volume_{sphere} = \frac{4}{3} \cdot \pi \cdot Radius^{3} $ $\displaystyle Radius = \frac{1}{2} \cdot Diameter $ $\displaystyle 1 litre = 1000 cm^{3} $ That's all you need. Let's see what you get.
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