12. Penny can knit 4 rows of a sweater in 5

minutes. How many hours will it take her

to knit 300 rows?

6.25 hours

Explanation:

From the question;

Penny can knit 4 rows in 5 minutes

We need to determine the time it will take for her to knit 300 rows

4 rows = 5 minutes

300 rows = ?

= (300 * 5) : 4

= 375 minutes

But, 1 hour = 60 minutes

Therefore;

= 375 : 60

= 6.25 hours

Thus, it will take penny 6.25 hours to knit 300 rows