If we assume a constant reading rate, can Joel finish the book in 6 hours?
I. Joel reads 54 pages an hour.
II. In 2 hours, he reads half the book.
If the data in statement II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question
Statement I is not sufficient because the number of pages in the book is
not given.
Statement II is sufficient because in 2 hours half of the book is read.
Time needed to finish 1 book = 2 x2 = 4 hours < 6 hours