It will take him 1/2 minutes for a full page. Since 1/6 page is 1/12 minute, to get a full page you need to multiply both 1/6 and 1/12 by 6. 1/6 multiplied by 6 will give one page and 1/12 multiplied by 6 gives 6/12 minutes which simplifies to 1/2 minutes