Jane had a 500 page book to read. The first half of the book Jane read with a speed of 10 pages per day, and the second half with a speed of 5 pages a day. How many days did Jane spend reading this book?
Half of the book means 500 / 2 = <T>divide(500, 2)=250.0 pages.
Reading the first half took Jane 250 / 10 = <T>divide(250, 10)=25.0 days.
Reading the second half of the book took Jane 250 / 5 = <T>divide(250, 5)=50.0 days.
So in total Jane needed 25 + 50 = <T>add(25, 50)=75 days to read the whole book.
