A man takes a morning walk for 45 minutes from 5:45 am to 6:30 am. One day he started at 5:40 am and decreased his speed and finished his walk at 6:30 am. He takes 5 hours more to cover a distance of 50 km if he decreases his speed by 5 kmph.

Quantity I: Distance it will cover in 4 hours at the decreased speed he took the morning walk at.

Quantity II: Distance he will cover in 3 hours at his usual speed.