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 TOPIC: math problẹm, help!!!![TO BOTTOM] 
 


atl_sweetie
date: 04-14-03
time: 04:57:40
total posts: 102

hello everyone
sweetie have this math problem need to be solve, if anyone knows, please show sweetie okay, thanks yall.

A rancher decides to enclose a rectangular region by using an existing fence along one side of teh region and 2240 feet of new fence on teh other three sides. The rancher wants the length of the rectangular region to be five times longer than its width. What will be the dimensions of the rectangular region???
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DiemTình
date: 04-14-03
time: 06:01:37
total posts: 121

Sweetie,

If you make the length of the rectangle to be the existing fence, then your dimension would be 1600 by 320.

l=length; w= width

l =5w

1 length is already given there for, the perimeter would be P=2w+l

Which means
P=2w+5w (replace lenght with 5w)
P=7w=2240 (divide both sides by 7 to get the length of the width)
w=320
Since the length is 5 times the width, 5 x 320 = 1600, and that's your length.

To check yourself:

P = 2l + 2w (we will only use 1 length due to the fact that one side is the existed fenc

P = 1600 + 320(2)
P = 2240

Hope that helps you sweetie
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mailfish
date: 04-15-03
time: 04:45:58
total posts: 1961

wow our math genius in residence hehe

but that is assuming that "the other 3 sides" have 2 widths + 1 length, if they have 2 lengths + 1 width it would be different yes ?
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DiemTình
date: 04-15-03
time: 06:21:12
total posts: 121

fishy,

Yes, assuming the existing side is the width, then the answer would be different.

If the existing side is a width, then the perimeter would be

P = 2l + w

l = 5w

P = 10w + w

2240 = 11w

w = 203.63 (approximately

which means the lenght have to be about 1018.18

to check yourself
P = 1018.18 x 2 + 203.63
P = 2239.99 which is about 2240 ...

then this one would have the dimension of

1018.18 by 203.63 ... that is roughly speaking

Sao, coi được không fishy????
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mailfish
date: 04-15-03
time: 12:29:26
total posts: 1961

coi được á DiemTình, our math professor in residence hehe

i had a feeling that it would end up with non-integer numbers

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atl_sweetie
date: 04-17-03
time: 05:04:45
total posts: 102

DiemTinh
thanks a lot.. I solve the problem already, just that I don't how to explain it. I guess I can now!!!
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®
date: 04-17-03
time: 07:06:41
total posts: 97

Hai lời giải của DT nếu bỏ dzo "If ...then" and var int là okie há fish. heheh DTình, just okie thui à
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mailfish
date: 04-17-03
time: 09:39:53
total posts: 1961

cái này là algebra chứ hông phải là geek language đâu mà lão ham heheh
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DiemTình
date: 05-06-03
time: 13:46:43
total posts: 121

hihihih ... rainman & fishy nè ... alg hay là "geek" hay là 2 anh thì ... hihihihi ... thôi Dtình không dám nói đâu ... sợ bị ăn đòn quá Rainman lâu lai khỏe không vây?????
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mailfish
date: 05-07-03
time: 10:18:58
total posts: 1961

hehe DiemTinh cô giáo dạy toán muốn nói gì á ? dám kiu tụi này là geek hả ? DT coi phim The Revenge of the Nerds chưa vậy ? hehe
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fall4u
date: 05-09-03
time: 23:17:45
total posts: 114

hehe, you know what, i had this exact math problem like this 4 years ago....
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