Question

After the first 15 minutes of laying down the cement, Caleb has used 1 3 of the bag of cement. At what rate does Caleb lay cement in bags per hour?

A. 2 bags per hour
B. 3 bags per hour
C. 4 bags per hour
D. 6 bags per hour

Answer 1

Caleb lays cement at a rate of 4 bags per hour, as he uses one-third of a bag in 15 minutes and there are four 15-minute intervals in an hour.

Step-by-step explanation:

The question asks us to determine the rate at which Caleb lays cement in bags per hour. After 15 minutes (which is ⅔ of an hour), Caleb has used ⅓ of a bag of cement. To find the hourly rate, we would need to see how many thirds of a bag can be used in a full hour. Since there are 4 quarters in an hour, and Caleb uses one-third of a bag in one quarter of an hour, we can multiply the rate by 4 to find the hourly rate.

So, ⅓ bag per ⅔ hour × 4 = ⅓ × 4 bag per hour = ⅔ bag per hour, which equals 4 bags per hour.

Therefore, the correct answer is C. 4 bags per hour.