It is required to punch a hole of diameter 10 mm on a sheet of thickness 3 mm. The shear strength of the work material is 420 MPa. The required punch force is

It is required to punch a hole of diameter 10 mm on a sheet of thickne

1.	It is required to punch a hole of diameter 10 mm on a sheet of thickness 3 mm. The shear strength of the work material is 420 MPa. The required punch force is
A.	19.78 kN
B.	39.58 kN
C.	98.9 kN
D.	359.6 kN
Answer» C. 98.9 kN

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It is required to punch a hole of diameter 10 mm on a sheet of thickness 3 mm. The shear strength of the work material is 420 MPa. The required punch force is

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