SOLUTION: Mr.bean can wash car in 15mint his son take twice as long as to do same job if they work togather how many mint wil tak same job?

Question 855813: Mr.bean can wash car in 15mint
his son take twice as long as to do same job if they work togather how many mint wil tak same job?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Mr Bean's rate:
( 1 car ) / ( 15 min )
Son's rate:
( 1 car ) / ( 30 min )
Working together:
( 1 car ) / ( t min )
------------------
Add their rates of working

Multiply both sides by

Working together, it takes them
10 min to wash a car

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