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Subject :NSO    Class : Class 7

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

A 21 s
B 29 s
C 31 s
D 37 s.

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8
Its "b" (sec with steps) (5-3)+(5-3)+(5-3)+5=11 (29 sec)

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