Direct stresses of 160N/mm2 tensile and 120 N/mm2 compressive exist on two perpendicular planes at a certain point in a body. They are also accompanied by shear stresses on the planes. The greatest principal stress at the point due to these is 200 N/mm2. What must be the magnitude of the shearing stresses on the two planes? What will be the maximum shearing stress at the point?

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