Question

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?

Answer 1

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.

Answer 2

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.