Answer :
[tex]m-meter\\mm-millimeter\\1m=1,000mm\to1mm=0.001m\\------------------\\\\1250mm=(1250\cdot0.001)m=1.250m=\boxed{1.25m}[/tex]
we know that
[tex]1\ meter=1,000\ millimeters[/tex]
so
by proportion
[tex]\frac{1}{1,000}\frac{m}{mm} =\frac{x}{1,250}\frac{m}{mm} \\ \\1,000*x=1,250\\ \\x=1,250/1,000\\ \\x=1.25\ m[/tex]
therefore
the answer is
[tex]1.25\ m[/tex]