Question

it takes 90 mintues to wash 20 vehicles at a car wash. at this rate how many minutes does it take to wash 5 vechicles.
90/20 = 4.5
So, It takes 4.5 minutes to wash 1 car.
4.5* 5 = 22.5
Therefore, it would take 22.5 minutes to wash 5 vehicles.

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