A drunkard is walking along a straight road. He takes 5 steps forward and 3 steps backward and so on. Each step is 1 m long and takes 1 s. There is a pit on the road 11 m away from the starting point. The drunkard will fall into the pit after
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Displacement in first eight steps = 5 -3 = 2 m
Time taken for first eight steps = 8s
Time taken by the drunkard to cover first 6 m of journey 
If the drunkard takes 5 steps more, he will fall into the pit. So the times taken by the drunkard to cover last five step = 5 s
Total time taken = 24s + 5s = 29s
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