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I wish to have a 100 sq.m rectangle (not a square) [#permalink]

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29 Jan 2004, 16:52

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

I wish to have a 100 sq.m rectangle (not a square) vedgetable garden. Since I have only 30 metres of barbed wire for fencing to keep my thieving neighbours out of my shit, i fence three sides of the rectangle, letting my house wall act as the fourth side. Do me a favor and find the sum of the length and width of the rectangular field. Cheers!

a. 29
b. 25
c. 20
d. Who gives a crap. I'd rather stare at the cutie to the left.
e. None of these
_________________

Pls include reasoning along with all answer posts.
****GMAT Loco****
Este examen me conduce jodiendo loco

Last edited by sunniboy007 on 29 Jan 2004, 17:00, edited 3 times in total.

It is 25 becoz is it given that the fourth side is the wall. So we can assume that it an be length or width but in any case its the same. lb=100 and we can use 2l+b or 2b+l, we get length=width=20 and length=width=5

even I'am a live easy fan of Sachin...but someone has Sachin cover driving as his avatar...so went for Sourav and now changed to Kapil holding aloft the world cup...to single yourself out ...go for someone else...maybe Laxman...

Vivek
_________________

"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

Length(L) * Width(W) = 100...(given)
2W + L = 30 metres....(given)
W= 100/L
Therefore, 2(100/L) + L = 30
Hence, L^2 - 30L + 200 = 0
=> (L - 20)(L - 10)
=> L = 20 or 10
Since we know that 2W + L = 30,
if L = 20 , W = 5
If L = 10, W = 10
Since teh garden is a rectangle and not a square (explicitly mentioned in question stem), L cannot = 10, and W cannot = 10
So, L=20, W=5

Does that help?
_________________

Pls include reasoning along with all answer posts.
****GMAT Loco****
Este examen me conduce jodiendo loco