The Rain Equation

At what rate should one walk through the rain in order to arrive at Destination A the least wet?

They say if you run, you get wetter.
But if you walk too slowly, it’ll take forever,
and the amount of time you’ll spend walking will make up for the raindrops you’d be hitting if you ran.

So, then, how does one come to determine the ideal rate?

I suppose you’d have to take into account the amount of rain coming down, per square inch, as they say? Though this hardly seems quantitatively sound.

And I suppose you would have to factor in the size of the raindrops –
is there a sheet of petite drips?
Or are there few but massive drops?

And I suppose it would depend on how far you’re going.
And in what direction the wind was blowing.
And through the type of place you were walking,
since the country has trees, and the city has scaffolding.

Would it matter if it were winter?
Would it matter if it were a sun-shower?
Would it make a difference if you didn’t mind
getting soaked as you walked along?
Or if you were dodging raindrops like stray bullets from hunters,
zooming across your lawn?

At what rate should one walk through the rain in order to arrive at Destination A the least wet?

NS 10.22.09