Mario and kenneth work in a car wash station.The time Marip takes in washing a car alone is 20 minutes less than the time that kenneth takes in washing the same car . If both of them work together in washing the car , it will take them 90 minutes . How long will it take each of them to wash the car?



Kenneth washed it for 70 minutes 
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thanks but how did u get it??
Sorry im wrong Mario takes 70 min. to wash it