Find the vertical stress at a depth of 40 cm from the surface if the radius of the circular load is 17 cm and the contact pressure is 6.5 kg/cm2.

Find the vertical stress at a depth of 40 cm from the surface if the

1.	Find the vertical stress at a depth of 40 cm from the surface if the radius of the circular load is 17 cm and the contact pressure is 6.5 kg/cm2.
A.	0.43 kg/cm2
B.	1.43 kg/cm2
C.	0.45 kg/cm2
D.	1.45 kg/cm2
Answer» C. 0.45 kg/cm2