Convert \[17500\text{ }decameter\text{ } into\text{ }kilometer\]

Hint: Do this question using unit conversion formula. Here we will use the formula of conversion from $decameter$ to $kilometer$.
i.e. 100 decameter= 1 km
1 decameter =10⁻²km

Complete step-by-step answer:
There are $100\text{ dam}$ in a $km$
i.e. $1\text{ }km\left( Kilometer \right)=100dam\text{ }\left( decameter \right)$
or $1\text{ }dam\left( decameter \right)=\dfrac{1}{100}km\left( kilometer \right)$
Then according to the question.
$17500\text{ }decameter=\dfrac{17500}{100}=175$
$17500\text{ }decameter=175\text{ }kilometer$

Note: Learn these conversions given below.
\[\begin{align}
  & Kilometer\left( km \right)=1000\text{ }m \\
 & Hectometer(hm)=100\text{ m} \\
 & Decameter\left( dam \right)=10\text{ }m \\
 & Meter\left( m \right)=1\text{ }m \\
 & Decimeter\left( dm \right)=.1\text{ }m \\
 & Centimeter\left( cm \right)=.01\text{ }m \\
 & Millimeter\left( mm \right)=.001m \\
 & Micrometer\left( um \right)=.000001m \\
 & Nanometer\left( nm \right)=.000000001\text{ }m \\
\end{align}\]
Using these formulas one can easily convert from one unit to another.