## Geometric Calculation

For students of class 9-10 (age 14-16)
famim2011
Posts: 24
Joined: Mon Dec 03, 2012 8:22 pm

### Geometric Calculation

When visiting a rectangular plantation, the foreman told you that they recently put up 28 Li of fencing around the entire plantation. Having spent hours walking the width of the plantation, you know that it is 3 Li long. What is the area (in 2 Li ) of the plantation?

nafistiham
Posts: 829
Joined: Mon Oct 17, 2011 3:56 pm
Location: 24.758613,90.400161
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### Re: Geometric Calculation

famim2011 wrote:When visiting a rectangular plantation, the
foreman told you that they recently put up 28 Li
of fencing around the entire plantation. Having
spent hours walking the width of the plantation,
you know that it is 3 Li long. What is the area (in
2
Li
) of the plantation?
I believe it is copied from any pdf. I would request, if you copy, fix the endlines. like this,
.
I am unsure of what it means by the red part. Seemingly, here width$=3$ and length$=\frac{28}{2}-3=11$ so, area$=33$
$\sum_{k=0}^{n-1}e^{\frac{2 \pi i k}{n}}=0$
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.

sakib.creza
Posts: 26
Joined: Sat Nov 03, 2012 6:36 am

### Re: Geometric Calculation

I agree that the area is $33$ Li but in terms of $2$ Li, the answer should be $\frac{33}{2}$ ,i.e. $16.5$. But I am not sure about the unit.

nafistiham
Posts: 829
Joined: Mon Oct 17, 2011 3:56 pm
Location: 24.758613,90.400161
Contact:

### Re: Geometric Calculation

Li is a chinese unit
but, what is "in 2 Li" ?
$\sum_{k=0}^{n-1}e^{\frac{2 \pi i k}{n}}=0$
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.