i still don't get this..

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- August 13th 2008, 06:59 AMz1llch
- August 13th 2008, 09:34 AMSoroban
Hello, Moo!

Quote:

**3) Simple geometry**

The Swedish flag has a yellow cross of**constant**width in a blue background.

The yellow area represents one-third of the flag's area.

If the flag is 1m long and 66cm wide, what is the width of the yellow stripes ?

The stripes comprising the cross can be "moved" to the edges of the flag.

Let = width of the stripe (cm).Code:`100`

* - - - - - - - - *

| | x

| * - - - - - - *

66 | | |

| | | 66-x

| | |

* - * - - - - - - *

x 100-x

The blue region's area is: . cm²

It is also: . cm²

Hence, we have: .

The Quadratic Formula gives us: .

The smaller root is the answer: . cm.

- August 13th 2008, 10:02 AMmasters