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During the standard testing of a standard concrete cube, we have measured the following data:
m=8136.1 g
a= 151.3 mm
b= 151.0 mm
h= 149.2 mm
F=987.5 KN
Calculate the compressive strength of the concrete!
Give your answer together with the unit. In case you have no unit, put a "-" character beside the value.

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