Karen read 20 pages of her book in a half hour. If she reads for 3 hours at that same rate, about how many pages of her book can Karen read?

1 Answer
May 10, 2018

120 pages

Explanation:

#to# 20 pages in #1/2# an hour

#:.# 40 pages in 1 hour

So, if Karen reads 40 pages in 1 hour then she would read #40x# pages in #x# hour(s).

Now, substituting '3' in place of #x# as in the question, we get

#40x# ... [ where #x# = 3]

#:. 40(3) = 120#

#:.# Karen would read 120 pages in 3 hours at the same speed as given in the question.