• Convert 3 hours into minutes: 3 x 60(minutes in an hour) = 180 minutes
• Divide to see how many times 30 minutes goes into 180: 180 ÷ 30 = 6
• Multiply: 25 x 6 = 150
So, Jenna can read 150 pages of a book in 3 hours. Hope this helps! :D
~PutarPotato