### Chork's Puzzle 19

Jon set off from his home to his office on his brand new car, driving at a constant speed of 66km/h. After driving for 16km, Jon realises that he left an important document at home and checks his watch to see if he has enough time to drive back home to collect the document. When he glanced at his watch, the minute hand was exactly over the hour hand.

Assuming at the time Jon set off, it was a whole number of minutes (ie. it just reached a particular minute and not halfway into the minute),

If you know the answer, post it in the comments section of this post.