if a raindrop is a perfect sphere,and it accumulates moisture at a rate proportional to its surface area. Show that the radius increases at a constant rate.(adsbygoogle = window.adsbygoogle || []).push({});

I know surface area of sphere = 4 * pi * r^2

dV/ dr = 4 * pi * r^2

I am not sure where to go from here

Any help is appreciated

Thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Related rates and rain drops

**Physics Forums | Science Articles, Homework Help, Discussion**