Two students in Mr. Floyd's class, Baldwin and Rick, have been assigned a workbook to complete at their own pace. They get together at Baldwin's house after school to complete as many pages as they can. Baldwin has already completed 15 pages and will continue working at a rate of 2 pages per hour. Rick has completed 25 pages and can work at a rate of 1 page per hour. Eventually, the two students will have completed the same number of pages. How long will that take?