What is the difference in pressure at ground level between two columns of water, both 60 inches in height, one 10 inches in diameter, the other 5 inches diameter?

this sounds like homework...

pressure is measured in psi. in other words force over a set area.

this link has the formula

Formula (hyperphysics.phy-astr.gsu.edu/Hbase/pflu.html)

you will notice the variables are density of the fluid (water for both examples)
gravity (same for both)
height/depth (same for both)

what do you notice about surface area?