A drunkard takes a step of 1m in 1s. He takes 5 steps forward and 3 steps backward and so on. The time taken by him to fall in a pit 13m away from the start is :
A
26s
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B
31s
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C
37s
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D
41s
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Solution
The correct option is C37s The man takes 5 steps forward and 3 steps backwards, distance from pit is 13 meters and distance of 1 step is 1 meter. 5m⟶2m7m⟶4m9m⟶6m11m⟶8m13m
Each step needs 8sec, 5 in forward direction and 3 in backward direction. Now, he reaches the distance of 8m in 32sec. Thus, he reaches the distance of 13m in 32+5=37sec.