Two car washers, Michelle and Nancy, are working on your car. Michelle can complete the work in 6 hours, while Nancy can complete the work in 3 hours. How many hours does the car washing take if they work together?
Time taken by Michelle to complete the work alone = 6 hours Time taken by Nancy to complete the work alone = 3 hours Now, when they both are working on the same job for 1 hour, Amount of job completed = (1/6) + (1/3) = (1 + 2)/6 = 3/6 = 1/2 So in 1 hours time they both will complete half of the job. Then in 2 hours Michelle and Nancy will complete the total job. I hope the answer has come to your help.
