Answer:
[tex]HB \approx 200.484[/tex]
Explanation:
The Brinell Hardness is obtained from the following formula:
[tex]HB = \frac{2\cdot P}{\pi \cdot D^{2}}\cdot \left(\frac{1}{1 - \sqrt{1-\frac{d^{2}}{D^{2}} } } \right )[/tex]
Where [tex]P[/tex] is the load measured in kilograms-force, [tex]D[/tex] is the diameter of indenter measured in millimeters and [tex]d[/tex] is the diameter of indentation measured in millimeters.
[tex]HB=\frac{2\cdot (1000\,kgf)}{\pi\cdot (10\,mm)^{2}}\cdot \left[ \frac{1}{1-\sqrt{1-\frac{(2.50\,mm)^{2}}{(10\,mm)^{2}} } } \right ][/tex]
[tex]HB \approx 200.484[/tex]
