There is no equivalence.
A ton is a measure of mass. 150 millimetres by 1 square metre is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
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1000000mm2=1m2
15.0cm = 150mm
1cm = 10mm => 150mm = 15cm
1m2 equates to 10,000cm2
If by "1m2" you mean 1 square meter, there is no answeras 6m (six meters) is a linear measurement and 1m2 (one square meter) is an area measurement and you cannot add different dimensions. - for example you cannot add an inch to a pint either!If by 1m2 you mean 1,2 m (one and two tenths meters) the answer is 7,2m