Answer:
16 hours
Step-by-step explanation:
If she reads 3/8 of the book in 1/4 of a day, she reads 3/8 of the book in 6 hours. In that case, she reads 1/8 of the book every 2 hours (divide 3/8 and 6 by 3). Knowing this, we know she reads 8/8 or the whole book in 16 hours (8x2).
