Ah, thank you for catching my arithmetic error. I was correct up to
15*(10-m)/8, but then I incorrectly
plugged in the value 4*sqrt[15] for m, when I should have plugged in m
= --4*sqrt[15].
After making this correction, the answer is actually 15*(5 +
2*sqrt[15])/4, which is indeed a positive real number.
So, the path lengths.
The beach path length is x = m + 150 = 150 - 4*sqrt[15].
The water path length is y = -4m = 16*sqrt[15]
On Apr 26, 1:41 pm, RKL <mary...@[EMAIL PROTECTED]
> wrote:
> In article
> <06f3325f-3c97-4d13-8276-3abbb81b7...@[EMAIL PROTECTED]
>,
>
> easonrevant <easonrev...@[EMAIL PROTECTED]
> wrote:
> >http://mathhelpnow.blogspot.com
>
> Interesting, if not circuitous method for solution. Unfortunately, the
> problem asked for path lengths. And your minimum time solution is
> negative.
>
> --
> He who waits to do a great deal of good at once, will never do anything.
|
