Question

pam read 126 pages of her summer reading book in 3 hours. Zack read 180 pages of his summer reading book in 4 hours. If they continue to read at same speeds, will they both finish the 215 page book after 5 total hours of reading?

Answer 1

First find how many pages each has left to read. 215-126=89
215-180=35.
Then set up a proportion for first reader. 3hours/126pages=x hours/89pages. This will give you the rate it would take to finish 89 pages.
3/126=x/89
267/126=x
2.12=x......
Therefore at that rate the reader will not meet the time limit. (3+2.12=5.12>5)

Do the same thing for reader 2
4/180=x/35
140/180=x
.78
4+.78=4.78<5
Reader 2 will make it

Answer 2

Well, you will need to find out how much each person reads per hour. To find that out, you will need to divide 126 by 3, resulting in 41 pages an hour. If you do the same thing with Zack, you will be able to find out that he reads 45 pages an hour. Now, you will need to multiply the number of pages per hour by 5! if you multiply 41 by 5, you get 205 pages. If you multiply 45 by 5, you get 225 pages. Pam isnt able to read more than 215 pages in 5 hours, but Zack is able to.