If it takes Billy 3 days to eat a blackberry pie 9 inches in diameter and 3 inches thick, and it takes Susy 4 hours to dig a hole 3 feet in diameter and 2 feet deep, how long will it take a hamster to change the spark plugs in a 1957 Chevy?
Answer:
Everyone knows that snakes can't fly planes! You take the giraffe out first and then put the elephant back in.