Question

Sarika walks half hour on the first day,one by four hour on the second day and follows the same pattern . How long will she walk on the fourth day?

Answer 1

1/2,1/4
(1/2)^2= second day
third day =(1/2)^3=1/8
4th day=(1/2)^4=1/16

Answer 2

1st day - 30 min

2nd day - 1 /4 × 60 = 15 min

Therefore the pattern is in G.P

a = 30
r = 1/2

Term 4= ar^n-1
=ar^3
=30×1/2^3
=30× 1/8
=3.75 min

Answer is 3.75 min


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