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Two questions,

a) how does pressure (in N/cm^2) on the cross section of a human bone change if the length (i'm assuming the length of the person) would increase 10 times ?

b) How big would a giant have to be so it's legs can support a pressure of 1000 N/cm^2 with a cross section area of 8 cm^2 ? (1 kg = 10 N)

ok, for b) i assumed it's just a matter of obtaining how much force would be generated, so it would be 8000 N , so the giant would be 800 kg. right?

but how do i go about doing a) ?, i thought of assuming for example a 190 cm male would weigh about 80kg in average, which gives 800 kg after multiplying the height by 10. but i would still need cross section area for it. I'm sure there is a better way to do this.

Thanks for any help.