Question

Answer to the nearest tenth of an hour.

8. Cinderella can clean her house in 4 hours. Her evil stepsister Anastasia can clean the
house in 7 hours. Her other evil stepsister Drizella can clean the house in 8 hours.
Assuming they get along, working together, how long would it take the three of them to
clean the house? Round to the nearest tenth of an hour.

Answer 1

To find the time it would take for Cinderella, Anastasia, and Drizella to clean the house together, we need to calculate their combined work rate. The answer is approximately 1.9 hours.

Step-by-step explanation:

To find the time it would take for Cinderella, Anastasia, and Drizella to clean the house together, we need to calculate their combined work rate. Cinderella can clean the house in 4 hours, Anastasia in 7 hours, and Drizella in 8 hours. We can use the formula:

Combined work rate = 1/(1/4 + 1/7 + 1/8) = 1/(0.25 + 0.1429 + 0.125) = 1/0.5179 = 1.93 hours.

Therefore, working together, it would take them approximately 1.9 hours to clean the house.

Learn more about Calculating combined work rate for multiple workers