SOLUTION: A technician and his assistant can repair a bus in 9 hours. The technician works 4 times as fast as his assistant. How long would it take the assistant to repair the bus alone?

Question 733605: A technician and his assistant can repair a bus in 9 hours. The technician works 4 times as fast as his assistant. How long would it take the assistant to repair the bus alone?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Their rate working together is ( 1 bus repaired ) / ( 9 hrs )
Let = the rate the assistant works
= the rate the technician works
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The assistant takes 45 hrs working alone
check:

OK
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