Savitha, a XI standard student, while conducting an experiment to determine the effective length of a simple pendulum L , notes down the data of time taken to complete 30 oscillations as 60 s and hence calculates the length of the simple pendulum as : (Take 2 = 9.8 , and g = 9.8 m/s 2 )

1. A. 0.75 m
2. B. 1 m
3. C. 1.5 m
4. D. 2 m

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