Kelly read 30 pages of her 300-page book in 6 hours. at this rate, how long will it take her to read the entire book.

Set up a proportion.

30/6 = 300/x

Cross multiply:

6 * 300 = 30 * x

1800 = 30x

Divide 30 to both sides:

x = 60

So it will take her 60 hours to read the entire book.