Find the value of
$(4 k m 86 m) - (2 k m 864 m) + 175 m$ .Giving your answer in $k m$

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Solution

Step 1- Conversion of $k m$ into $m$ :
We have,
$1 k m = 1000 m$
$\Rightarrow 4 k m = 4000 m$
$\Rightarrow 2 k m = 2000 m$
So, $(4 k m 86 m) - (2 k m 864 m) + 175 m = (4000 m 86 m) - (2000 m 864 m) + 175 m$
$= 4086 m - 2864 m + 175 m$
Step 2- Find addition of $4086 m & 175 m$ :
We get,
$4 0 8 6 m + 1 7 5 m 4 2 6 1 m$
Step 3- Find the difference $4261 m - 2864 m$
Now we have, $4261 m - 2864 m$
$4 2 6 1 m - 2 8 6 4 m 1 3 9 7 m$
So, $4261 m - 2864 m = 1397 m$
Because $1 m = \frac{1}{1000} k m$
Therefore, $1397 m = \frac{1397}{1000} = 1.397 k m$
$\Rightarrow (4 k m 86 m) - (2 k m 864 m) + 175 m = 1.397 k m$
Hence, the value of $(4 k m 86 m) - (2 k m 864 m) + 175 m$ is $1.397 k m$

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