Re: Help on a Maths problem

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#54

From: teddy boy
Date: Sat, 13 Jul 2002 20:59

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I'd do these on a graph, unless you're doing this at postgrad level on an
engineering course or something

1)
if one of the numbers is 1, the other is 12, sum = 13
                                    2                     6               8
                                    3                     4               7
                                    4                     3               7
                                     5                   2.4             7.4
                                     6                    2                8
looks like a minimum value somewhere between  x=3 & x=4


2)
similarly  using   pi times r^2 times h
and  r + h = 12
so if r=1, h=11
       r=2, h=10
and so on, work out the values and graph them

enjoy

Jon


"Jonathan" <jp_wells@optusnet.com.au> wrote in message
news:3d1eedb4$0$25797$afc38c87@news.optusnet.com.au...
> As part of a school assignment I have to complete these two problems, but
I
> have no idea as to how to do them, I was wondering anyone knows how to do
> them?
>
> 1)  The product of two positive number is 12. Find the least value of
their
> sum. Is there a largest value?  (10 marks)
>
> 2)  The sum of the base radius and perpendicular height of a cylinder is
> 12cm. Find the maximum volume of the cyclinder.  (10 marks)
>



>
> Thankyou
>
>

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