Question

Andi must write a 7-page paper for school. She wrote 3 pages in 80 minutes. At this rate, how many additional hours will it take her to finish writing the paper?

Answer 1

Answer:

1 7/9 hours

Step-by-step explanation:

She needs to write 4 more pages  (7-3 =4)

Using a ratio

3 pages         4 pages

-------------- = -----------------

80 minutes     x minutes

Using cross products

3x = 4*80

3x = 320

Divide by 3

3x/3 = 320/3

x = 320/3 minutes

We want hours so divide by 60

320/3 * 1/60

320/180

1 7/9 hours

Answer 2

Divide.

80 / 3 = 26 2/3 minutes per page...

Multiply.

26 2/3 * 7 = 186 2/3 minutes for 7 pages

Best of Luck!