After the first 20 minutes of laying down the cement, you had used 1/4 of the bag. What is the rate you are laying cement in bags per hour? What is the unit rate?

3/4 of a bag per hour.

1 hour is equal to 60 minutes

1/4 of a bag is equal to 20 minutes

20 minutes times 3 is equal to 60 minutes.

1/4 times 3 is equal to 3/4.

If you would like to know what is the rate you are laying cement in bags per hour, you can calculate this using the following steps:

20 minutes ... 1/4 of the bag

1 hour = 60 minutes ... x = ?

20 * x = 1/4 * 60

20 * x = 15 / 20

x = 15/20

x = 3/4 of the bag

Result: After 1 hour ( = 60 minutes) of laying down the cement, you will use 3/4 of the bag.

If you would like to know what is the unit rate, you can calculate this using the following steps:

20 minutes ... 1/4 of the bag

x minutes = ? ... 1 bag

20 * 1 = x * 1/4 / * 4

20 * 4 = x

x = 80 minutes

Result: After 80 minutes, you will use 1 bag.