$1km250m=....................km$
Fill in the blank by chosing correct option from the following options

The correct option is D $1.250$
We know that $1m$=$1000km$.

Now, let us convert $250m$ in kms by dividing it by $1000$ as follows:

$\frac{250}{1000}=0.25$

Therefore, $250m$=$0.25km$

Thus we have:

$1km$ $250m$=$(1+0.25)km$=$1.25km$

Hence, $1km$ $250m$=$1.25km$