SOLUTION: 21. If carol can finish a job in 5 hours and Steve can finish the same job in 10 hours, how many minutes will it take both of them together to finish the job?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: 21. If carol can finish a job in 5 hours and Steve can finish the same job in 10 hours, how many minutes will it take both of them together to finish the job?      Log On


   

Question 739502: 21. If carol can finish a job in 5 hours and Steve can finish the same job in 10 hours, how many minutes will it take both of them together to finish the job?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Carol's rate:
( 1 job ) / ( 5 hrs )
Steve's rate:
( 1 job ) / ( 10 hrs )
----------------
Add their rates of working to get rate
working together
+1%2F5+%2B+1%2F10+=+1%2Ft+
Multiply both sides by +10t+
+2t+%2B+t+=+10+
+3t+=+10+
+t+=+10%2F3+ hrs
Convert to minutes
+%28+10%2F3+%29%2A60+=+200+
It will take them 200 min working together