Question

1.4 metres is the same one of which one: 1400mm
140mm
1400cm
14cm

Answer 1

$m-meter\\mm-millimeter\\cm-centimeter\\\\1m=1,000mm\ \ \ (mili=0.001\ of\ some\ unit)\\1m=100cm\ (centi=0.01\ of\ some\ unit)\\1.4m=1.4\times1,000mm=\huge\boxed{1,400mm}\\\\1.4m=1.4\times100cm=\huge\boxed{140cm}$