Question

Donna reads a book at a rate of 20 chapters per hour.

How many chapters does she read in 4 hours?

Answer 1

20/1=20 1 hour read one book

Explanation:

4 chapter read in 4 hour because 1 chapter read in one gour

Answer 2

80

Explanation:

When working with rates, multiplication is very useful. Rate questions will give a specific rate and then a time period. They often ask, based on the rate, what can be achieved in the given time period.

The question says that if Donna can read 20 chapters in 1 hour, how many chapters can she read in 4 hours. To solve this, you can multiply 20*4; this will show how many chapters she reads in the given time period.

Since 20*4=80, she must read 80 chapters in 4 hours.