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12 Apr 2012, 23:53
vidhya16 wrote:
All,

The length of a rectangular garden surrounded by a walkway is twice its width. If difference between the length and width of just the rectangular garden is 10 meters, what will be the width of the walkway if just the garden has width 6 meters?

Note: My translation :"The length of a rectangular garden surrounded by a walkway is twice its width." =>

Let L,W be the length and width of the garden respectively. Let x be the width of the walkway. According to the above statement L = 2x.

" If difference between the length and width of just the rectangular garden is 10 meters"

L - W = 10

also W = 6. => L-6 = 10 => L = 16 => x=8. but the explanation above is still not clear for me.

Please can some one explain how the author translated the above statements in to equation as above?
Thanks,
Vids

I have the same question....could someone please explain this example?

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02 Jun 2012, 15:20
peace and good will to all

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03 Jun 2012, 05:27
Great post.

However, I translate the 5 example and what is wrong with this:

garden : L1 L1 W1 W1

walkway: L2 L2 W2 W2

L1= 2*W2

L1 - W1 = 10

W1= 6

W2 = ?

2W2 - 6 = 10 >>>> W2 = 8

Same of the post above. May a Mod could say something about .......................
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16 Nov 2012, 07:17
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Great Post man..!

Thanks for putting time and effort for the forum.... +1 from me..
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04 Jan 2013, 00:51
I have a problem here.
it is said that: If the problem says ‘the difference of x and y’ it means ‘x – y’
is it true? isn't it means |x-y|, stated i other words, the distance between x and y?

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11 Jul 2013, 00:08
Bumping for review*.

*New project from GMAT Club!!! Check HERE

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13 Sep 2013, 20:53
catty2004 wrote:
vidhya16 wrote:
All,

The length of a rectangular garden surrounded by a walkway is twice its width. If difference between the length and width of just the rectangular garden is 10 meters, what will be the width of the walkway if just the garden has width 6 meters?

Note: My translation :"The length of a rectangular garden surrounded by a walkway is twice its width." =>

Let L,W be the length and width of the garden respectively. Let x be the width of the walkway. According to the above statement L = 2x.

" If difference between the length and width of just the rectangular garden is 10 meters"

L - W = 10

also W = 6. => L-6 = 10 => L = 16 => x=8. but the explanation above is still not clear for me.

Please can some one explain how the author translated the above statements in to equation as above?
Thanks,
Vids

I have the same question....could someone please explain this example?

I am unable to understand this problem too. Why do we assume uniform width for walkway?

Rgds
SBS

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19 Sep 2013, 00:59
I tried to understand the derivation of the first author, but failed to do so. So, I just drew a figure. Once you understand that the width of the rectangular garden includes the walkway and that "just the garden" lies within this rectangular, the question becomes simple.

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12 Nov 2014, 15:08
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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22 Aug 2015, 07:25
In this question are we assuming the width of the walkway to be uniform around the garden ?

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22 Aug 2015, 07:32
vimoha wrote:
In this question are we assuming the width of the walkway to be uniform around the garden ?

Yes. The width is assumed to be uniform around the garden.

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30 Aug 2015, 18:58
Dear All
Need great help
Question 5 is referred .
How to get this equation : L -2x = Length of just garden and W-2x = width of just garden , I can't find it in the question steam , please help , many thanks

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30 Aug 2015, 19:06
Ohh sorry I got it,
There are twice of walk away need to be subtracted from garden to make the equation
Many thanks

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29 Apr 2016, 08:56
catty2004 wrote:
vidhya16 wrote:
All,

The length of a rectangular garden surrounded by a walkway is twice its width. If difference between the length and width of just the rectangular garden is 10 meters, what will be the width of the walkway if just the garden has width 6 meters?

Note: My translation :"The length of a rectangular garden surrounded by a walkway is twice its width." =>

Let L,W be the length and width of the garden respectively. Let x be the width of the walkway. According to the above statement L = 2x.

" If difference between the length and width of just the rectangular garden is 10 meters"

L - W = 10

also W = 6. => L-6 = 10 => L = 16 => x=8. but the explanation above is still not clear for me.

Please can some one explain how the author translated the above statements in to equation as above?
Thanks,
Vids

I have the same question....could someone please explain this example?

I know this is old but word problems are my weakness. Can someone explain this please?

EDIT: where i am getting confused is I'm not sure why there can be a separate width for just the walkway. Because the walkway surrounds the garden, then shouldn't the walkway for just the garden be the width of garden plus walkway??

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29 Apr 2016, 09:22
ross14 wrote:

I know this is old but word problems are my weakness. Can someone explain this please?

Word problems become easier when you break it down into manageable chunks.

The length of a rectangular garden surrounded by a walkway is twice its width. If difference between the length and width of just the rectangular garden is 10 meters, what will be the width of the walkway if just the garden has width 6 meters?

Refer to the figure for the description.

L,W and x are the length, width of the garden and width of the walkway around the garden.

From "The length of a rectangular garden surrounded by a walkway is twice its width." , you get = 2*width of the garden ---> L' = 2*W' , where L' = length of garden with the walkway and W' = width of the garden with the walkway.

Thus, from above , you get L' = 2W' --> L+2x = 2*(W+2x)

From, "Difference between the length and width of just the rectangular garden is 10 meters" ---> L-W = 10

Finally, from "garden has width 6 meters" ---> W=6.

Now, you have 3 distinct equations and 3 variables --> solve for them.

Hope this helps.
Attachments

4-29-16 12-09-21 PM.jpg [ 25.26 KiB | Viewed 1409 times ]

Last edited by ENGRTOMBA2018 on 29 Apr 2016, 10:12, edited 1 time in total.
Updated the figure.

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09 May 2017, 04:39
Hello from the GMAT Club BumpBot!

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04 Jul 2017, 13:27
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The length of a rectangular garden surrounded by a walkway is twice its width. If difference between the length and width of just the rectangular garden is 10 meters, what will be the width of the walkway if just the garden has width 6 meters?

Solution:
Ok this one has more words than the previous examples, but don’t worry, lets break it down and see how simple it becomes.
Key words: and (implies addition); twice (implies multiplication); difference between (implies subtraction where order is important); what (implies variable); is, will be (imply equal to)

Since this is a slightly more complicated problem, let us first define what we want.

'What will be the width of the walkway' implies that we should assign a variable for width of the walkway and find its value.

Thus, let width of the walkway be ‘x’.

Now, in order to find the width of walkway, we need to have some relation between the total length/width of the rectangular garden + walkway and the length/width of just the garden.

Notice here that if we assign a variables to the width and length of either garden+walkway or just garden, we can express every thing in terms of just these variables.

So, let length of the garden+walkway = L

And width of garden+walkway = W

Thus length of just garden = L – 2x

Width of just garden = W - 2x

Note: Remember that the walkway completely surrounds the garden. Thus its width will have to be accounted for twice in both the total length and total width.

Now let’s see what the question gives us.

‘Garden with width 6 meters’ translates to:
Width of garden = 6
W – 2x = 6
Thus, if we know W we can find x.

‘Length of a rectangular garden surrounded by walkway is twice its width’ translates to:
Length of garden + length of walkway = 2*(width of garden + width of walkway)
L = 2*W

‘Difference between the length and width of just the rectangular garden is 10 meters’ translates to:
Length of garden – width of garden = 10
(L – 2x) – (W – 2x) = 10
L – W = 10

Now, since we have two equations and two variables (L and W), we can find their values. Solving them we get: L = 20 and W = 10.

Thus, since we know the value of W, we can calculate ‘x’

10 – 2x = 6
2x = 4
x = 2

Thus, the width of the walkway is 2 meters.

Easy wasn't it?

With practice, writing out word problems in the form of equations will become second nature. How much you need to practice depends on your own individual ability. It could be 10 questions or it could be 100. But once you’re able to effortlessly translate word problems into equations, more than half your battle will already be won.

Let us now move onto specific word problem topics:

1) 'Work' Word Problems : http://gmatclub.com/forum/work-word-pro ... 87357.html
2) 'Distance/Speed/Time' Word Problems : http://gmatclub.com/forum/distance-spee ... 87481.html[/quote]

The way the question is written is really confusing to me.

Like I would not read "length of a garden surrounded by a walkway is 2x its width" as the length of the garden and the walkway.

I would read is the length of JUST the garden and treat the walkway part as a detail that is not necessary relevant right from the start...

is this an official question or something you created as an example?

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