SOLUTION: Rick can rake leaves twice as fast as his little sister. They worked together and finished the job in 8 hours. How long would it take Rick to do the job himself?
Rick's sister's p
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Question 734255: Rick can rake leaves twice as fast as his little sister. They worked together and finished the job in 8 hours. How long would it take Rick to do the job himself?
Rick's sister's part is 1 over 2x times 8
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of working to get their rate working
together.
Let = Sister's rate in ( jobs / hr )
= Rick's rate in ( jobs / hr )
given:
The 1/8 means ( 1 job / 8 hrs )
Rick could do 2 jobs in 24 hrs, which is the same as
1 job in 12 hrs
So, he could do the job by himself in 12 hrs
check answer:
OK
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