Can u answer logical qestion ???

M. N. JHA (CA) (8316 Points)

16 June 2011  
A snail is at the bottom of wall and wants to getout. He manages to craul up the wall 3 feet each day, but at night he must rest and so he slips back down 2 feet. If the wall is 30 feet, how many days will it take him to getout ???