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Asked by Preeti Last Modified
Answer 
5 step forward and 3 step backwards ,net displacement is 2m and take 8s
Similarly for next steps ,total time taken 16s and 4m
Same procedure for others up to 8m net displacement and take 32 s
But afterwards ,when he walks 5 step forward he drop into pit . Because the distance from starting is 13m
So total time taken is 32+5=37 s
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