Unbeknown Paedobaptist

If it rained for 40 days and 40 nights, and the animals entered in pairs at a rate of thirty pairs per day, how long did it take Moses to get all 720 animals onto the ark?

Detective Sergeant Smith turned up at the station slightly later than intended. He didn't start working, he just looked at his watch, sighed and went home. His chief wasn't a stickler for punctuality, so why the change in heart?