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Volume of a sphere: [tex]\frac{4}{3}\pi r^{3}[/tex]A snowball melts in volume @ 1 cm³/min. At what rate is the diameter decreasing when the diameter is 10 cm?

Volume of a sphere in terms of diameter: [tex]\frac{\pi d^{3}}{6}[/tex]

Rate of volume: [tex]\frac{d}{d(time)}volume = -1 cm^{3}/min.[/tex]

Rate of diameter: [tex]\frac{d}{d(time)}10 cm = ?[/tex]

I'm not sure what to do at this point