The radius of Mohr’s circle representing the given state of stress in MPa is

Question

The state of stress at a point under plane stress condition is $\sigma _{xx} = 60Mpa$, $\sigma _{yy} = 120Mpa$ and $\tau _{xy} = 40Mpa$

The radius of Mohr’s circle representing the given state of stress in MPa is

         (a) 40      (b) 50      (c) 60       (d) 120