If the line is
$$
\ell=\{(x,0): x\in\mathbb R\},
$$
then for every $\varepsilon&gt;0$, we have
$$
\ell\subset \bigcup_{k\in\mathbb Z}I_k^\varepsilon,
$$
where
$$
I_k^\varepsilon=[k,k+1]\times[2^{-|k|-2}\varepsilon,-2^{-|k|-2}\varepsilon].
$$
But
$$
m_2(\ell)\le\sum_{k\in\mathbb Z} m_2(I_k)=\sum_{k\in\mathbb Z} 2^{-|k|-1}\varepsilon=\varepsilon.
$$
Thus $m_2(\ell)&lt;\varepsilon$, for every $\varepsilon&gt;0$, and hence $m_2(\ell)=0$.

Any other straight line in $\mathbb R^2$ is obtained by a rigid motion of $\ell$, and rigid motion does not change the Lebesgue measure of a set.

Indeed, every proper linear subspace (or more generally, every proper hyperplane) 
of $\mathbb R^n$ has zero $n-$dimensional Lebesgue measure.

Lebesgue measure of any line in $\mathbb{R^2}$.
i am wanted to copy the all the files in folder including sub-folders from one hard drive to another hard drive

for this i tried below xcopy command

C:\Documents and Settings\rakesh>xcopy "D:\Ganesh Drive\Trimax soft important" "
H:\" /E /k /x

but after executing this command i am getting access denied on the destination drive partition.
Please let me why and how rectify the same.
