Question

Working alone at a constant rate, Carla can wash a load of dishes in 2 hours. How long will it take her to wash the same load of dishes if she works with her friend, who washes dishes at the same rate?

a) 1 hour
b) 2 hours
c) 3 hours
d) 4 hours

Answer 1

Carla and her friend will be able to wash the load of dishes in 1 hour if they work together.

Step-by-step explanation:

To find the time it takes for Carla and her friend to wash the load of dishes together, we can add their individual rates of work. Since Carla can wash a load in 2 hours, her rate of work is 1/2 load per hour. Since her friend washes dishes at the same rate, we can add their rates: 1/2 + 1/2 = 1 load per hour. Therefore, it will take Carla and her friend 1 hour to wash the load of dishes together.