A man fell into a 30 feet deep well, in one minute he climbs 3 feet up and slips 2 feet down. How much time it will take for him to come out of the well?
ANSWER
28 minutes
SOLUTION
Puzzle is very easy and answer looks is 30 minutes. Since he is climbing 3 feet and and falling 2 feet in one minute so he climbs 1 feet per minute. since well is 30 feet deep . It takes 30 minutes to climb.
But this is wrong.
On 28th minute he climbs out of well and won't slip back.
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