A drunkard walking on a narrow lane takes 8 steps forward and 6 steps backward and so on. Each step is Im long and he requires Is to travel. The time that the drunkard takes to fall irrapit 18m away from the starting point is

Options

A. 18s
B. 126s
C. 78s
D. 62s

Answer

C

Explanation

Displacement `s=8-6=2m`
For `2m, t=8+6=14s`
or time `1m =7s " for " 10m, "time " =70s`
In the next 8s , he covers 8 steps and falls into the pit.
Total time `=70+8=78s`