DAY 372

THE CAR WASH

Three cars go into a car wash. For each car to complete the cycle, it must go through all three of the following steps, in the right order. Each stage takes one minute to complete.

Step 1: Rinse

Step 2: Wash

Step 3: Dry

How long does it take for all three cars to complete the cycle?

Answer:

5 minutes ........... It is not necessary for the second car to wait until the first car has completed the cycle. The third car enters the Rinse step at the beginning of minute three.