On Apr 13, 8:41=A0pm, Stan Brown <the_stan_br...@[EMAIL PROTECTED]
> wrote:
> Sun, 13 Apr 2008 08:03:41 -0700 (PDT) from =A0<dzogche...@[EMAIL PROTECTED]
>:
>
> > I have been swatting up using a book I purchased, which has a question
> > about area:
>
> I think the root of your difficulties may be that this is not a
> problem about area; it's a problem about perimeter. The fence goes
> around the area, it doesn't cover the area.
>
> > How much will it cost to build a wall round a house that is 25 metres
> > long and 75 metres wide, if the cost of 50 cm is =A310?
>
> So 1 metre costs 20 pounds.
>
> The fence will be 25+75+25+75 =3D 200 metres (without allowing for a
> gate). A 20 pounds per, the cost is 4000 pounds.
>
> > Your options are
> > A) =A34,000, B) 40,000 or C) =A3400. =A0The answers are meant to be
> > estimations,
>
> I don't know what that means, since (A) is exactly correct.
>
> > What is the answer? I have calculated the answer, but when I checked
> > it I found I was wrong,
>
> Please, please, in future show us wheat you did and what answer you
> got. =A0We can give you *far* better help in that way, because we can
> point out the specific error you're making. =A0You learn much more this
> way than by simply looking at our solutions.
>
> --
> Stan Brown, Oak Road Systems, Tompkins County, New York, USA
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0
=A0htt=
p://OakRoadSystems.com
> ****kata ga nai...
Yes, fair point Stan. I think the reason for putting in the bit about
estimations btw, is that if you do the problem incorrectly, as I did,
you get 37500, which would be rounded up to 40,000 as an estimate -
throwing you off the sent if you make the silly mistake I did.
D
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