# Two municipalities

The horizontal distance between municipalities is 39 km. Average sinking is 7 per mille. What is the difference in height between these municipalities?

Correct result:

x =  273 m

#### Solution:

$a=39 \ km \rightarrow m=39 \cdot \ 1000 \ m=39000 \ m \ \\ k=\dfrac{ 7 }{ 1000 }=0.007 \ \\ \ \\ x=a \cdot \ k=39000 \cdot \ 0.007=273 \ \text{m}$

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