The figure shows the state of stress at a certain point

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The figure shows the state of stress at a certain point in a stressed body. The magnitudes of normal stresses in the x and y directions are 100 MPa and 20 MPa respectively. The radius of Mohr's stress circle representing this state of stress is

1. 120 MPa
2. 80 MPa
3. 60 MPa
4. 40 MPa

Correct Option: C

r =	σ_x + σ_y
	2

=	100 + 20	= 60 MPa
	2

∴ Radius of Mohr’s circle = 60 MPa