Algebra word problem? Help please
Favorites|Homepage
Subscriptions | sitemap
HOME > > Algebra word problem? Help please

Algebra word problem? Help please

[From: ] [author: ] [Date: 12-01-23] [Hit: ]
how long did it really take to finish the job together? They end at the same time.Please help me! I would like some details please!Cassie starts 3 hours after Sam at which time Sam will have completed 3/5 of the job.The job will be complete after Sam works alone for 3 hours and Sam and Cassie work together for approximately 53 minutes.......
Sam takes 5 hours mopping the while school with no breaks. Cassie takes 4 hours doing the same job. If Sam started on hour early and if Cassie started 2 hours kate, how long did it really take to finish the job together? They end at the same time.

Please help me! I would like some details please!

-
Sam's rate = 1/5 per hour
Cassie's rate = 1/4 per hour

Combined rate working together = (1/5 + 1/4) = 9/20 per hour

Cassie starts 3 hours after Sam at which time Sam will have completed 3/5 of the job.

Working together to complete the last 2/5:

t = (2/5)/(9/20) = 8/9 hours ≈ 53 minutes

The job will be complete after Sam works alone for 3 hours and Sam and Cassie work together for approximately 53 minutes.

-
243434567 hours
1
keywords: please,problem,Help,word,Algebra,Algebra word problem? Help please
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .