$2-10$ A jaw crusher works a feed material to reduce the average particle

sizes from $50mm$ to $10mm$ with the consumption of energy of $13\mathrm{.}0$

KW$($KG$/$S$).$ Calculate the energy consumption needed to crush the sam

material of average size $75mm$ to an average size of $25mm$ :

a$)$ assuming Rittinger's law applies?

b$)$ assuming Kick's law applies?

Which of these results would be regarded as more reliable and why?