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Are you seriously asking this question or just playing around?

However if you are serious then it would take approx. 22 minutes and 30 seconds.

This is a basic math question from high school. 90min= 20 Cars ?min=5 cars

20/4=5 so divide 90 by 4 as it take four times as long to wash 20 cars as it does 5 cars so 90/4= 22.5 or 22 min and 30 sec.

90 min = 20cars

22.5 min = 5 cars

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16y ago

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