How can the government of a nation invest in physical capital?

Human capital is the investment that a government can do in terms of physical capital. Note that education is a very powerful factor that can help a country grow due to the amount of knowledge that a group and/or an individual can gather with education. That's why nations invest heavily through the means of schools for better development and boost in research in various aspects.

Ais 190 b is 200c it can't be more then 100%