The Ink-Blooded Prince · Physics Brawl 2020 #FoL.7
Physics · mechanics
Problem
When Harry Potter did not behave, professor Umbridge would punish him by forcing him to write with his own blood. He needed 1.21μl of blood on average to write one lowercase letter. A book of school rules has 259 standard pages, each of which contains 1488 letters on average. However, each thirty-seventh letter is a capital letter, which means it consumes three times more ink than a lowercase letter. Assuming that Harry has 5l of blood, how many copies of the rules could be made from him?