A worker under Halsey method of remuneration has a day rate of Rs.12/week of 48 houfs, plus a cost of living bonus of 10 paisa per hour worked. He is allowed to given 8hours task to perform,which he accomplish in 6 hours. He is allowed 30% of the time saved as premium bonus. What would be his total hourly rate of earning and what difference would it make if he paid under Rowan method .