Problema Solution
Jerry can detail a car by himself in 50 minutes. Sally does the same job in 1 hour. How long will it take them to detail a car working together?
Answer provided by our tutors
Jerry's rate is 1/50 car per min.
Sally's rate is 1/60 car per min.
Let 'x' represent the number of minutes needed for Jerry and Sally to detail a car together.
The together rate is 1/x car per min.
1/50 + 1/60 = 1/x
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click here to see the equation solved for x
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x = 27.27 min
Jerry and Sally need 27 minutes approximately to detail a car together.