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Re: SAT and the AT



ARTCLOUTMN@aol.com wrote:
> 
> Christina,
> >23. excluding rest stops, it took juanita a total of 10
> >hours to hike from the base of a mountain to the top
> >and back down again by the same path (could this be >Katahdin?).
> > if while hiking she averaged 2 miles per hour going up and
> >3 miles per hour going down, how many miles was it from the
> >base to the top?
> 
> >a)8
> >b)10
> >c)12
> >d)20
> >e)24
> 
> Did you figure out the answer?
> I will use it on my Algebra 2 class.
> 
>              Art Cloutman
 
It's 12, isn't it?

let x=distance up (&down)
 then    x / 2 mph = time up  
   &     x / 3 mph = time dn

put it all togeather to get :  x/2 + x/3 = 10hrs.   

multiply each value in the equation by 6(least common multiple?) to get
:
 3x+2x=60  or 5x=60  or x=60/5=12

good luck on the test !!

t.


-- 


Tom Fort 
tfort@teclink.net

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