Answer 4.2:7
From Förberedande kurs i matematik 1
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| - | |width="100%" |   | + | |width="100%" | The width of the river is <math>\ \displaystyle\frac{10}{\sqrt{3}-1}</math> m <math>\approx 13\textrm{.}7</math> m.  | 
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Current revision
| The width of the river is \displaystyle \ \displaystyle\frac{10}{\sqrt{3}-1} m \displaystyle \approx 13\textrm{.}7 m. | 
