On Apr 13, 5:25=A0pm, "Brian M. Scott" <b.sc...@[EMAIL PROTECTED]
> wrote:
> On Sun, 13 Apr 2008 08:03:41 -0700 (PDT),
> <dzogche...@[EMAIL PROTECTED]
> wrote in
> <news:de9d8f03-80df-432e-9a5f-04eb2a979a24@[EMAIL PROTECTED]
>
> in alt.math.undergrad:
>
> > I have been swatting up using a book I purchased, which has a question
> > about 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? Your options
are=
> > A) =A34,000, B) 40,000 or C) =A3400. =A0The answers are meant to be
> > estimations,
> > What is the answer? I have calculated the answer, but when I checked
> > it I found I was wrong, but I cannot get the supposed answer. =A0I am
> > trying to just work out if the book is wrong or not.
>
> The wall is to be 25 + 75 + 25 + 75 =3D 200 metres long. =A0Each
> half-metre costs =A310, and the wall is 400 half-metres long,
> so ... .
>
> Brian
OK, I didnt do that. I took 25 * 75 which gives you 1875 m. If one
half meter is =A310, then a full one is =A320. So I get 37500. Taking
your calculation Brian, 10 * 400 =3D =A34000, which is the answer. Its
been a good 18 years since I was at school, so I am very rusty with
this stuff. I thought this was an area question, hence 25 * 75....so
I need to think about what you did with just the additions, I
obviously dont understand the question!
Thanks.
D
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