Brain Teasers
Car Wash Cycle
Three cars go to the car wash. For each car to complete the cycle, they must go through all three stages in the right order, and each stage takes 1 minute to complete:
1.Pre-soak
2.Rinse/polish
3.Dry
How long does it take for all three of the cars to complete the cycles?
1.Pre-soak
2.Rinse/polish
3.Dry
How long does it take for all three of the cars to complete the cycles?
Hint
Continuously going.Answer
5 minutes. Here's why:1st minute:
Pre-soak: Car 1
Rinse/polish: empty
Dry: empty
2nd minute:
Pre-soak: Car 2
Rinse/polish: Car 1
Dry: empty
3rd minute:
Pre-soak: Car 3
Rinse/polish: Car 2
Dry: Car 1
4th minute:
Pre-soak: empty
Rinse/polish: Car 3
Dry: Car 2
5th minute:
Pre-soak: empty
Rinse/polish: empty
Dry: Car 3
6th minute:
Pre-soak: empty
Rinse/polish: empty
Dry: empty
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