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Re: [RC] metric - Joe Long

On Thu, 10 Aug 2006 12:36:19 -0600, "Brenda K."
<enduranceracing@xxxxxxxxxxxx> wrote:

Geeze Joe, whether metric, imperial or otherwise, an acre (There are roughly
2 1/2 of 'em in a hectare) is a two-dimensional rather than a linear
measure. So, if you want to talk gallons per acre, I guess you'd have to
figure out how far you would have to go driving back and forth across an
acre of land until you've covered it all. With a big John Deere and a 60-ft
set of harrows, you could cover that acre in a lot fewer passes than you
could with a lawn-mower that has a 42-in sweep. Of course, the Deere is
going to need more fuel just to start than the Yardman will use cutting the

Ho ho ho.

You're right, an acre is two-dimensional, but if you take a big tank
with a bottom exactly one acre in area, and start pouring in water,
after a while the water will begin to get deeper and deeper the more
gallons you put in.  The depth of the water is the linear measure --
expressed as "gallons per acre."

Mathematically, it is volume divided by area, which is linear.

Joe Long


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[RC] metric, Brenda K.