humpty dumpty had a gr8 fall

A drunkard is walking along a straight road.He takes 5 steps forward and 3 steps backward,followed by 5 steps forward and three steps backward an so on.Each step is one meter long and takes 1 second.there is a pit on the road 11 meter away from the starting point.

How many seconds will it take the drunkard to fall into the pit?

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