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

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The pattern in which she is walking is ( in hrs)
1/2, 1/4, 1/8, 1/16
she will walk 1/ 16 of an hour on day 4.
which means 60*(1/16)= 60/16= 3.75 minutes

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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